Substack Sponsorship Vision + Paid Subs Insights

October 15, 2026 |
Keenen Charles

This week Substack shared new formats for it's nascent sponsorship program. It'll be interesting to see how this does and if it's expanded to the wider platform soon. And there's a look at how many free readers actually convert to paid subscribers.

And the featured newsletters this week cover health, AI, marketing, and more!

📰 News & Articles

Substack's vision for sponsorships

Substack unveiled new formats for its sponsorships program and new tools for brands.

Everyone should start a newsletter

Shape your thinking, and the thinking of others, with consistent writing in public.

Just six in 1,000 free newsletter readers become paying subscribers

Beehiiv data shows only a small fraction of free newsletter readers actually become paying subscribers.

⭐ Featured Newsletters

Longevity Latest

Evidence-graded longevity supplements, hype checks, and ageing science

Odds Briefing

FREE Newsletter covering Sport and betting

Zsigma Lab

Quantitative Trading, Algorithms, Stock Market

Founder Marketer

Mindful narrative into markets, business and premium brands.

IPrompt - AI intelligence brief

The 5 AI stories that matter

See Ya

This is our weekly newsletter covering tips and tools for newsletter operators and everything else happening in the email newsletter space. Hope you enjoyed it!

Keenen Charles

Keenen is the creator of InboxReads and a believer in the future of newsletters and email for sharing great content.

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