I understand that a user on any instance can subscribe to any community in the fediverse, but I have been a bit confused when searching for communities to join. Sometimes there are communities on different instances, with the exact same name.

  • Do these communities talk to each other at all, or are they completely separate, with a different host, posts, mods, subscribers etc.

  • Should I just join the largest (and presumably, most active) one?

  • Is there anything in place to discourage communities of same name, but different instances, from “competing”?