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.
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Do these communities talk to each other at all, or are they completely separate, with a different host, posts, mods, subscribers etc.
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Should I just join the largest (and presumably, most active) one?
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Is there anything in place to discourage communities of same name, but different instances, from “competing”?
My understanding is that some instances can attract particular users for particular reasons and those instances also can have particular rules. So, by that, particular communities will have filtered/moderated posts… for example, but not limited to, political leanings, other proclivities etc