Okay single cases are always possible and I don`t want speak about single names.
Deciding is what is with the large majority? For instance at the "Fritz(real-time)server",greatest chessserver in Europe, there are 100.000 registered users (only in chess).And here? 9000 User,but in all games and every player has at least one additional account :).But it`s okay,this is another relationship,you cannot compare.