Could be alts of current players. Could be people whose playstyle isn't compatible with EMC. Could be people who had a server presence forever but *just* joined the forums. Friends of players checking the server out.
Also worth noting that the members page in no way represents the full membership of EMC - many players either can't or don't join the forums but participate in game.
Doesn't mean much tbh. A lot of players throughout minecraft don't connect their data with namemc or other outside sites. It's also not uncommon to find players who don't change their usernames that much, if ever.
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