Writing New Content Drives Signups
Justin Gage, founder of Technically, on how Substack earns its 10% take rate
For a paid newsletter, publishing cadence is the top of the funnel. Each new post is both the product for existing readers and the main acquisition event for new ones, because it creates another email hit, another web page to circulate, and another reason for readers or adjacent newsletters to forward it. That makes growth feel less like buying ads and more like compounding a catalog of shareable posts.
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Technically’s own data shows most reading happens through email, not homepage browsing, with one example post drawing 85% of readership from email and 6% direct. In practice, a new issue reactivates the installed base first, then some fraction of that audience forwards it outward and turns distribution into signups.
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The highest leverage external boosts look like audience overlap, not generic promotion. A guest post in Lenny’s newsletter brought in many subscribers because the readers were already primed for the topic, and an IBM sales leader mentioning Technically in a keynote created a concentrated pocket of signups inside one company.
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This is also why newsletter platforms keep building recommendation and referral systems. Substack recommendations added 10,000 free subscribers to Technically in about four months, while Beehiiv and ConvertKit pushed their own recommendation and sponsor networks, turning creator growth into a product feature rather than something each writer does alone.
The next phase is a tighter link between publishing and distribution tooling. The platforms that win will be the ones that help a writer turn every new post into multiple growth surfaces, inside email, inside recommendation feeds, and through cross promotion, while also improving the quality of those new signups so more of them become paying subscribers.