Million is a huge numer for any game to sell. So I would imagine this being a success even if they can't manage to retain but a fraction of those players.

And honestly I don't see how they could, mindless grinding isn't hip anymore. Nevermind that the games whole economy is practically designed for gold farming and RMT. Almost everything that you can possibly think of has a hefty gold sink attached to it in Aion. Bots abound.

Terrible, terrible game.