"Imagine YouTube, Instagram, Twitter, Discord, and OnlyFans had a baby … and that baby’s all grown up now and hooking up with Substack … their lovechild would be the aspirational Substack 2.0."

A zero-sum product is one that can only “win” when another product “loses” an equal amount, i.e. the sum of gains and losses is equal to zero.

A positive-sum product is one that can “win” even when another product doesn’t lose an equal amount, i.e. the sum of gains and losses is greater than zero — it’s possible to have a win-win game.