Just to provide another example - itch.io is a great platform for retrogaming where the games are either free or cost like $5 and $2.5 on sale: https://itch.io/s/121680/birthday-sale .

It's centralized, etc, all the usual issues, but note that the price is small enough that I would not mind buying it if I like the game.

Maybe you need something like that? Your usual content would be free, while your long form content would be for 2000 sats or $5 😉