I'm very hopeful for the possibility of using bluesky for blob data.
A friend and I had considered looking into storing DOOM WADs on bluesky so that "map packs" could be shared in the same way posts are. Follow an account, a list, or a starter pack, and you could theoretically modify GZDoom or some other client to know how to search and view any WADs posted by those accounts. Like how the Steam Workshop works, except it's via bluesky. :D
This is a cool idea, are you thinking of self-hosting this or on their servers? Have they mentioned anything about any guidelines for what their blob storage can be used for? I know doom is small and that's a great idea, a workshop is a perfect example of how this can be used. I'm just wondering if this can be abused to outsource large server space.
Look into Lexicon on https://atproto.com
You can define custom records for basically anything
A PDS would be a point in the network that decides if abuse is happening, also a place where competition can occur