See below where I did that
I'm not too sure how the game room thing goes with MMORPG and monthly fees. I'm thinking that the individual still has to pay a monthly, he can just log in anywhere. You are thinking something like Steam's internet Cafe liscensing scheme, where they pay a certain amount for a certain number of computers to play CS S or whatever online.
However, for my argument, I'm taking the largest amount of monthly income possible. Why? Because if I reduce the amount of estimated money they are taking in, it means the costs take up proportionatly more of the profit. I figure if I take the most conservative figures for the largest amount of profit, and it still seems like they aren't making insane percentages, its more likely that my "guesstimates" are accurate. I still take the position that I dont think they are pulling in even 50% profit, I think its much less.