"More than 10 million. It depends if you're taking a day, a week, three months. We did another stat for the Guinness Book of World Records that was total active unique [users] over time, and that was just over 105 million. So 105 million people have touched it," Gerhard
Yes I'm sure that many have signed on and I highly doubt a good chunk of that sign back on regularly besides bots and the like.
I know people who have made several accounts just to flame people on it.
Who would actually want to play this game it is shockingly awful.
I'd rather play WoW any day(that is big coming from a Guild Wars man).