grenv: How many moves I play is mostly determined by how fast my opponents play. If I have 100 games going on, it's my turn in 20 games, I make 20 moves, and it takes many hours before my opponents play again (for instance, because they're in a different time zone), I only make 0.2 moves per game. But that's not my fault, is it?

One can only make 10 moves in a single game on a day, if your opponent moves as fast and around the same time as you do. With players from America, Europe, Asia and Australia, being able to move more than a few times a day in a single game is an exception - not the rule. And certainly not determined by the number of total games one is playing.