Lemmy

This seems like a potential severe issue though - with just a few accounts, you could, without arousing too much suspicion, just try to get as much communities mirrored to your server as possible. This also means that, with a sufficient amount of users, every (large) fediverse server will have basically a complete copy of all other servers. It seems to me that this will lead to severe scaling issues, as the cost of hosting an instance will just go through the roof once a certain user count is reached.