I can't think of any reading off the top of my head, but Patreon and other services usually work this way: many creators provide their primary work (the web com

I can't think of any reading off the top of my head, but Patreon and other services usually work this way: many creators provide their primary work (the web comic, the podcast, etc.) for free, regardless of backing. Backers typically get extras. For example: I received a digital sketch of my choice for backing a comic artist.