see https://readup.org/comments/ars-technica/pocket-casts-makes-its-web-player-free-takes-shots-at-spotify-and-ai/DdqlX5

also Untitled

Idea similar to Bookwyrm

but similarly, you can also think: goodreads for Howlongtobeat; basically anything where you review some type of media

or federated imdb: do we really need these