Help the user grow their email list or newsletter audience — lead magnets, content upgrades, cross-promotion networks, referral programs, social-to-email funnels, SEO-to-email capture, and opt-in optimization. This skill is tool-agnostic but includes platform-specific guidance.
Step 1 — Gather context
If references/learnings.md exists, read it first for accumulated knowledge.
Ask the user:
- Where are you now?
- A) Starting from zero — building a list for the first time
- B) Under 1,000 subscribers — early traction
- C) 1,000–10,000 subscribers — growing steadily
- D) 10,000+ subscribers — optimizing and scaling
-
What growth channels are you using (or want to use)?
- A) Organic content (blog, SEO, YouTube, podcast)
- B) Social media (Twitter/X, LinkedIn, Instagram, TikTok)
- C) Cross-promotion with other newsletters/creators
- D) Paid ads (Meta, Google, Twitter, sponsor swaps)
- E) Referral programs (subscribers recruit subscribers)
- F) Lead magnets / content upgrades
- G) Not sure — help me pick
-
What's your niche/topic? (helps tailor lead magnet and channel advice)
Step 2 — Strategy and approach
Growth channels ranked by cost and effort
| Channel | Cost | Effort | Speed | Best for |
|---|---|---|---|---|
| Lead magnets | Free–Low | Medium | Medium | Converting existing traffic |
| Content upgrades | Free | Medium | Medium | Blog/SEO traffic |
| Cross-promotion | Free | Low | Medium | 1K+ subscribers |
| Referral programs | Low | Low (after setup) | Slow–Medium | Engaged audiences |
| Social → email | Free | High (ongoing) | Slow | Audience on social already |
| SEO → email | Free | High (upfront) | Slow | Long-term compounding |
| Paid ads | $$$ | Low–Medium | Fast | Scaling a proven funnel |
| Guest posts / podcasts | Free | High | Slow | Authority building |
Lead magnets that convert
High-converting formats (10–50% opt-in rates):
- Checklists & cheat sheets — one-page, immediately useful
- Templates & swipe files — ready to use, saves time
- Mini-courses (3–5 email lessons) — builds habit of opening
- Quizzes — interactive, personalized result requires email
- Free tools / calculators — ongoing value, bookmarked and shared
Medium-converting formats (3–10%):
- Ebooks / guides — comprehensive but higher commitment to consume
- Webinar replays — time-gated urgency helps
- Resource lists / toolkits — curated recommendations
Low-converting formats (1–3%):
- "Subscribe to my newsletter" — no specific value prop
- Generic "get updates" — worst performing CTA
Opt-in form optimization
Placement (in order of conversion rate):
- Exit-intent popup — 2–5% conversion, catches leaving visitors
- Inline within content — 1–5%, contextually relevant
- Sticky bar — 0.5–2%, persistent visibility
- Sidebar widget — 0.5–1%, familiar but often ignored
- Footer — 0.2–0.5%, last resort
Copy formula:
- Headline: State the specific outcome ("Get the 10-step checklist to...")
- Subheadline: Address objection or add specificity ("Used by 500+ creators")
- CTA button: Action-oriented, specific ("Send me the checklist" > "Subscribe")
- Social proof: Subscriber count, testimonials, logos
Cross-promotion strategy
- Newsletter swaps: You promote their newsletter, they promote yours (free, mutual)
- Paid recommendations: Other newsletters get paid to recommend you ($1–$5/subscriber)
- Co-created content: Joint webinar, guide, or resource with cross-promotion
- How to find partners: Similar niche, similar size (0.5x–2x your list), non-competing
Referral program design
Reward tiers (proven structure):
| Referrals | Reward |
|---|---|
| 1 | Exclusive content / bonus resource |
| 3 | Access to community or archive |
| 5 | Physical merch (stickers, mug) |
| 10 | Premium tier access / 1-on-1 call |
| 25 | Featured in newsletter / lifetime premium |
Keys to success:
- Make sharing effortless (pre-written tweet, copy-paste link)
- Show progress (leaderboard, progress bar)
- Rewards should be desirable but not so expensive they attract gaming
- Fraud prevention: Referral programs are susceptible to fake signups, bot traffic, and self-referral abuse. Prevention strategies: require double opt-in for referred subscribers, verify referred email engagement (opens/clicks) before awarding rewards, set a minimum engagement window (e.g., subscriber must open at least 1 email within 14 days), block disposable email domains, monitor for suspicious patterns (same IP, rapid-fire signups, identical referrer chains), and review top referrers manually. Track 30-day retention of referred subscribers — if a referral source shows >50% unsubscribe rate, investigate or block it
Social-to-email conversion
Twitter/X → email:
- Pin a tweet with your lead magnet link
- End high-performing threads with "Get the full breakdown in my newsletter: [link]"
- Use newsletter content as tweet threads → funnel interested readers
LinkedIn → email:
- Post native content with CTA in first comment (not in post — LinkedIn deprioritizes external links)
- Create carousel posts → "Download the full version: [link in comments]"
YouTube → email:
- Mention lead magnet in video with verbal CTA
- Link in video description + pinned comment
- Create a dedicated landing page for each video's audience
Podcast → email:
- Dedicated landing page per episode (easy-to-say URL)
- Offer episode-specific bonus content as lead magnet
Step 3 — Platform-specific guidance
For platform-specific audience growth features (Kit, Beehiiv, SparkLoop, Mailchimp, Substack, Omnisend, ActiveCampaign, GetResponse, Unbounce, Leadpages, Ghost, ZoomInfo FormComplete, Clearbit, SendPulse, AdRoll, Lettergrowth, Collab Match, InboxReads, MutualGro, ReferralKit, ReferralHero, GrowSurf, KickoffLabs, UpViral, LaunchList, Waitlister, Waitlistly, Preshiplist, Referlist, Tuemilio, GetWaitlist, Refind, Viral Loops, Referral Factory, RafflePress, ShortStack, SweepWidget, Customers.ai, etc.), see references/platforms.md.
Step 4 — Actionable guidance
Quick-start plan by stage
0–500 subscribers:
- Create one high-value lead magnet (checklist or template)
- Build a dedicated landing page
- Share on 1–2 social channels consistently
- Add opt-in form to your website (inline + exit-intent)
- Goal: 50–100 subscribers/month
500–2,000 subscribers:
- Add a content upgrade to your 3 best-performing pages/posts
- Start cross-promoting with 2–3 similar-sized newsletters
- Optimize opt-in copy (A/B test headlines and CTAs)
- Add social proof to forms (subscriber count if >500)
- Goal: 100–300 subscribers/month
2,000–10,000 subscribers:
- Launch a referral program with 3–4 reward tiers
- Join paid recommendation networks (Kit Creator Recs, SparkLoop, Beehiiv Boosts)
- Create a second lead magnet for a different audience segment
- Test paid acquisition on one channel ($5–$10/day)
- Goal: 500–1,500 subscribers/month
10,000+ subscribers:
- Scale paid recommendations (increase budget per subscriber)
- Invest in SEO content that drives email opt-ins
- Launch an ambassador/affiliate program for super-fans
- Negotiate direct newsletter swaps with larger publications
- Goal: 2,000–5,000+ subscribers/month
Measuring growth
| Metric | What it tells you | Good benchmark |
|---|---|---|
| Opt-in rate | Landing page / form effectiveness | 20–40% (landing page), 1–5% (inline) |
| Cost per subscriber | Paid acquisition efficiency | $1–$3 (recommendations), $2–$8 (ads) |
| Referral rate | How many subscribers refer others | 5–15% participate |
| Growth rate | Month-over-month list growth | 10–20% monthly |
| Unsubscribe rate | Content quality signal | <0.5% per email |
Gotchas
-
"Subscribe to my newsletter" is the worst CTA — always offer something specific (checklist, template, mini-course). Generic CTAs convert 3–5x worse than specific lead magnets.
-
Double opt-in kills conversion but helps deliverability — disabling it can boost signups 10–20% but increases spam complaints and hurts sender reputation. Keep it on if deliverability matters more than raw numbers.
-
Referral programs need 2K+ subscribers to work — below that, there aren't enough participants to generate meaningful viral growth. Start with other channels first.
-
Paid recommendations have quality variance — not all $2 subscribers are equal. Track 30-day retention of recommendation-sourced subscribers. Drop sources where >50% unsubscribe within 30 days.
-
Social followers ≠ email subscribers — converting social to email is slow (typically 0.5–2% of followers opt in). Don't count on social alone for list growth.
- Self-improving: If you discover something not covered here, append it to
references/learnings.mdwith today's date.
Before recommending a specific platform skill
This skill covers a strategy domain across many platforms. Before pointing the user to any specific platform skill (any /sales-{platform} listed in ## Related skills, e.g., /sales-mailshake, /sales-klaviyo, /sales-apollo), read that platform skill's actual SKILL.md first. The 1-line description in ## Related skills is enough to identify a candidate — it's not enough to commit to it or to write a prompt that invokes it well.
How to read it:
- If
~/.claude/skills/{skill-name}/SKILL.mdexists locally,Readit. - For
sales-*skills,WebFetchdirectly from this repo:https://raw.githubusercontent.com/sales-skills/sales/main/skills/{skill-name}/SKILL.md— e.g., forsales-mailshake:https://raw.githubusercontent.com/sales-skills/sales/main/skills/sales-mailshake/SKILL.md. - For non-
sales-*skills (third-party), look up{org}/{repo}in~/.claude/skills/sales-do/references/skill-sources.mdif installed and fetch the sameskills/{skill-name}/SKILL.mdpath under that repo.
After reading, ground your recommendation in something concrete from the SKILL.md (its scope, a sub-flow, its argument-hint shape, or a "Do NOT use for..." negative trigger). Align any generated invocation with the platform skill's argument-hint. If the platform skill turns out not to fit the user's situation, swap to another or handle the question here directly rather than recommending a poor fit.
Related skills
/sales-email-marketing— Email marketing strategy (what to send once you have subscribers)/sales-newsletter— Newsletter monetization (making money from your list)/sales-digital-products— Selling digital products (ebooks, courses, templates)/sales-funnel— Funnel strategy (landing page and conversion optimization)/sales-kit— Kit platform help (Kit-specific setup)/sales-mailchimp— Mailchimp platform help/sales-getresponse— GetResponse platform help/sales-activecampaign— ActiveCampaign platform help/sales-omnisend— Omnisend platform help (popups, forms, Wheel of Fortune for ecommerce)/sales-unbounce— Unbounce platform help (landing pages, Smart Traffic AI, popups, sticky bars, A/B testing, DTR)/sales-leadpages— Leadpages platform help (landing pages, pop-ups, alert bars, Leadmeter, A/B testing)/sales-sendpulse— SendPulse platform help (pop-ups, subscription forms, multi-channel follow-up)/sales-clearbit— Clearbit platform help (form shortening, enrichment, Autocomplete API)/sales-zoominfo— ZoomInfo platform help (FormComplete, WebSights)/sales-adroll— AdRoll platform help (retargeting for list growth, lookalike audiences, ecommerce integration)/sales-buttondown— Buttondown platform help (newsletter publishing, paid subscriptions, Markdown, API, CLI)/sales-ghost— Ghost platform help (publishing, newsletters, memberships, Stripe, Mailgun, API, migration)/sales-beehiiv— Beehiiv platform help (publishing, growth, monetization, ad network, API)/sales-lettergrowth— Lettergrowth platform help (free cross-promotion directory, 1,300+ newsletters, partner discovery)/sales-collabmatch— Collab Match platform help (niche cross-promotion directory, ~200 newsletters, Web3/tech skew, weekly matching)/sales-inboxreads— InboxReads platform help (5,600+ newsletter directory, 1-click cross-promo swaps, Opportunities Board, Live Media Kits, ad pricing suggestions, free/$8-58/mo)/sales-mutualgro— MutualGro platform help (creator collaboration with AI partner matching, scheduled X/LinkedIn posting, accepts non-newsletter projects, free/£3.99/mo)/sales-referralkit— ReferralKit platform help (no-code newsletter referral program by Copyhackers, merge-tag-driven, milestone rewards, free for first 10K leads, Mailchimp/Kit/MailerLite/AWeber ESPs)/sales-referralhero— ReferralHero platform help (full-stack referral/affiliate/waitlist/contest with REST API, webhooks, Zapier, multi-level referrals, coupon groups, 6 native ESPs, PRO $199/mo and PREMIUM $399/mo)/sales-growsurf— GrowSurf platform help (in-product referral AND affiliate program software for SaaS/B2C — JavaScript SDK + embeddable Elements, REST API, 7 webhook events, Stripe-native triggering, affiliate commissions with 1099 filing, participant-based pricing)/sales-viral-loops— Viral Loops platform help (turnkey referral/waitlist/giveaway/milestone/ambassador campaign templates, embeddable widget, per-campaign publicToken REST API + webhooks + two-way Zapier; Build ~$49/Accelerate ~$229)/sales-referral-factory— Referral Factory platform help (no-code referral program builder, 100+ branded templates, User-centric REST API with referrer attribution + qualification→due-reward flow + in/outbound webhooks, native HubSpot/Salesforce/Stripe syncs; Basic ~$200/Pro ~$400, scales by users)/sales-kickofflabs— KickoffLabs platform help (viral waitlists, bonus-entry giveaways, milestone rewards, leaderboard giveaways with v1+v2 REST API, structured fraud webhooks, AnyForm + KOL.js, $13/mo Hobby to $202/mo Enterprise annual)/sales-upviral— UpViral platform help (viral sweepstakes, giveaways, waiting lists, milestone referral programs with REST API + Callback-URL webhooks, IP-based fraud detection, A/B testing; API gated to Business $119/mo annual+, Starter $79/mo has no API)/sales-rafflepress— RafflePress platform help (WordPress giveaway/contest plugin, 30+ entry actions, refer-a-friend, outbound webhooks (no HMAC, social-action data excluded) + Zapier "New Contestant Created" + 15+ native ESPs; no REST API, free Lite + one-time Pro ~$299)/sales-shortstack— ShortStack platform help (standalone SaaS contest/giveaway/quiz/refer-a-friend campaign platform — Entries APIentries.shortstack.comwith Token auth + SIGNED webhooks (X-Ss-Signature HMAC) + native Mailchimp/HubSpot/Salesforce/Zapier; free-forever plan + paid tiers)/sales-sweepwidget— SweepWidget platform help (cheap, high-limit giveaway/contest/sweepstakes builder, 100+ entry methods across 30+ social platforms — read+write REST APIsweepwidgetapi.com/sw_api/with Bearer auth + 50/pagepage_start+ HMAC-SHA256 signed webhooksX-SweepWidget-Signature, both Enterprise-gated; free-forever plan, native ESP/Zapier/JS-callback on lower tiers)/sales-kingsumo— KingSumo platform help (cheapest one-time/lifetime-deal viral giveaway tool from the AppSumo team; hosted app + separate WordPress plugin; Zapier is trigger-only (New Contestant/New Giveaway, no actions), "Webhooks by Zapier" only, native SendFox/Zapier free + Mailchimp/Kit/Klaviyo paid; a "fully-featured API" is advertised but has NO public docs; no custom domain, unverifiable shares)/sales-launchlist— LaunchList platform help (viral pre-launch waitlist with one-time lifetime pricing $0–$79+, gamified referrals + position inflation, no public API — form POST + webhooks/Zapier at Grow $79+)/sales-waitlister— Waitlister platform help (pre-launch waitlists with built-in email broadcasts, REST API + 5 HMAC-signed webhook events at Growth $49/mo, unlimited subscribers from $15/mo, no Zapier)/sales-waitlistly— Waitlistly platform help (validation-first hosted waitlist landing pages, custom domains, on-signup webhooks → Zapier/Make/Slack/your own API, free to start, no public REST API)/sales-preshiplist— Preshiplist platform help (no-code pre-launch waitlist builder that also sends the launch emails itself via built-in drip sequences; the most closed member of the family — no API/webhooks/Zapier, CSV export only, free plan is draft-only)/sales-referlist— Referlist platform help (cheap no-code waitlist with Dropbox/Robinhood-style referrals, npm SDK + JS snippet + REST API on Pro, Mailchimp/Airtable/CSV export, free for first 100 signups)/sales-tuemilio— Tuemilio platform help (early-access waitlist + viral referral loop with REST API + JS SDK + webhooks on all tiers, leaderboards, white-labeled dashboards, Zapier/Mailchimp, Founder $29/Startup $49)/sales-getwaitlist— GetWaitlist platform help (developer-friendly pre-launch waitlist + referral widget, REST API from Basic $15/mo with unauthenticated POST /signup, new_signup/offboarded_signup webhooks, no free tier for new accounts)/sales-refind— Refind platform help (CPA-based newsletter ad network, 488K curated readers, cross-promotion, publisher earning)/sales-retargeting— Retargeting strategy (using ads to drive visitors back to signup pages)/sales-b2b-advertising— account-based advertising (WebSights feeds retargeting audiences)/sales-do— Not sure which skill to use? The router matches any sales objective to the right skill. Install:npx skills add sales-skills/sales --skill sales-do
Examples
Example 1: First lead magnet
User says: "I write a newsletter about productivity for remote workers. How do I grow my list?" Skill does: Recommends a "Remote Work Productivity Checklist" lead magnet, suggests a Kit landing page + exit-intent popup on their blog, provides opt-in copy formula, and outlines a 0–500 growth plan Result: User has a lead magnet, landing page strategy, and month-by-month growth plan
Example 2: Referral program setup
User says: "I have 5,000 subscribers and want to set up a referral program" Skill does: Designs a 4-tier reward structure, recommends Kit's built-in referral system (Pro plan) or SparkLoop as alternatives, provides sharing templates and fraud prevention tips Result: User has a referral program blueprint ready to implement
Example 3: Social-to-email strategy
User says: "I have 15K Twitter followers but only 800 email subscribers. How do I convert them?" Skill does: Creates a Twitter → email playbook: pin tweet with lead magnet, thread-to-newsletter funnel, profile link optimization, and weekly cadence of conversion CTAs Result: User has a systematic approach to converting Twitter audience to email subscribers
Troubleshooting
Opt-in rates are low (<1%)
Symptom: Landing page or form gets traffic but few sign-ups Cause: Weak value prop, generic CTA, or form asks for too much info Solution: Make the lead magnet more specific and immediately useful. Use only email field (no name). A/B test headline copy. Add social proof. Try a different form type (popup vs inline).
Referral program has low participation
Symptom: Referral program launched but <2% of subscribers participate Cause: Rewards aren't compelling, sharing is too hard, or subscribers don't know about it Solution: Mention the referral program in every email (footer or dedicated section). Provide pre-written share text. Make the first reward tier achievable (1 referral). Show a progress bar.
Subscriber quality is low from paid channels
Symptom: Growing fast via paid recommendations but engagement dropping Cause: Acquired subscribers aren't genuinely interested in your content Solution: Track 30-day and 60-day retention by acquisition source. Cut sources where >40% unsubscribe within 60 days. Tighten targeting or switch to higher-quality (but more expensive) channels.