Cryptopool.eu currently hold 8.8 of 13.1, yes people need to leave that pool but miner just keep mining.
and cryptopool accepts new registrations via invitations (which is why you see all those "invite me" posts)
If you ask me, that's lame. Sorry if I'm using strong words, but I really get very angry when I see such tactics...
"We stopped registrations but we still allow invitations..."
That's how much we care about the coin.