The information for user # on STO is incorrect 

The number isn't backed up by a citation, but whoever wrote it is definitely referencing this infographic: http://sto.perfectworld.com/news/?p=1089211 They have misinterpreted the "3.2 million captains" section. A captain is a character in the game, not a user. The game has 3.2 million player characters, and a user can have more than one character. The number of registered users i certainly less than 3.2 million.