I believe there are some BookWyrm users here, that’s why I’m trying to (mis)use this community as a support forum.
In the latest Fediverse rush I’ve created a BookWyrm account and imported my GoodReads data. Some of the books in my library are pretty niche, had to be imported from OpenLibrary and don’t have a cover picture. So I made a cover photo for one of them and uploaded it to BookWyrm and OpenLibrary.
Now I’m wondering… Is book data entered into BookWyrm contributed back to OpenLibrary? Does anyone use OpenLibrary? OpenLibrary seems to offer pretty much what BookWyrm offers sans the federation. Still, it seems like a good and open project, and being hosted by archive.org and having been co-created by Aaron Swartz. Now I’m on the fence what to use. :-)
BookWyrm does not contribute back to OpenLibrary (it’s an upstream source). If you want to contribute to book data, OL is the place. BW is for users.
BW also uses data from https://inventaire.io which is (almost entirely) based on Wikidata, which is nice as well.