I have no idea why Mastodon does what it does, but I also have no idea why anyone would build a weird auto reposting group thing for Mastodon. I honestly don’t understand how I’m supposed to use it, or preview what a group is. The listing I saw doesn’t tell me anything. Very odd.
I actually always thought there was a possibility that what happened to AOL might happen to Google / Facebook / etc. I.e. people inherently don’t like extreme walled gardens, and will splinter off into more open, more random, more innovative spaces. I think the pendulum had swung back over to an early AOL like very limited set of 5 or so big “platforms”, and the issues with that were seen again, just like in the late 90s when people were ditching AOL for “the real Internet” en masse.