VGcharts is hardly accurate and usually represents shipped units. If 660k until actually sold, that would of meant server populations of approx 35,000 players/ server at launch (unless a whole whack of people bought the game and never played.) If there was close to 30,000 people per server near launch I'd be damned surprised considering the search often only revealed 3,000-4,000 online at once until they disabled the feature.
What most people don't get around their head is concurrent users and total users are widely different. Take League of Legend, currently the most played online game in the world.
As of October 2012, Riot Games claims League of Legends has over 32 million registrations and averages 12 million players worldwide per day; global concurrent users online regularly peak at over 5 million players, as of March 2013.
32 Million accounts, 12 million play daily
and yet peak is only over 5 million. Peak is only 1/6 of the total accounts, less than half of the boasted daily players. I don't claim nor dispute that there were 600k or only 100k copies sold, but most of the people statement here regarding current online game population equal copies sold is just, so far off. Edited, Apr 4th 2013 12:12am by Khornette