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The income earned by Substack authors from sources other than subscriptions, such as sponsorships and book deals.
Substack’s CEO said more than 50 authors earned over $1 million in paid subscriptions in 2025, a claim reported widely but not fully verifiable from public data . Independent analyses such as Press Ga...
Public reporting shows that a subset of headline Substack publishers supplement subscription revenue with brand sponsorships or outside investment, but the ecosystem’s privately negotiated deals and S...
The reporting does not provide a single, definitive leaderboard of ’s fastest-growing writers, but multiple sources point to a mix of legacy media stars, platform-native viral winners, and a handful o...