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”?
I think the opportunity is more interesting though for apps to provide a federated multi-community experience seamlessly. E.g. a/technology shows me an intermingled feed of all the c/technology communities that my home instance federated with