There has been players that came up with their own dedicated servers, but that is underground and the numbers of people that play in this is pretty much unknown. I know that there are many that had downloaded the illegal copy and then their account from Steam later became banned. After that, more of them downloaded more illegal copies in new accounts. But they are few since it takes a little sophistication on knowing how to trick Steam into thinking you not are the same person with another account using either the same pirated copy or a new pirated copy. I am sure there are people who had downloaded pirated copy and after their account getting banned, they later purchase the game and created a new account. I wish I had access to that statistics.