So...If you play a game on Battlenet like Diablo III (for instance) it would COST YOU?!? No thanks. I'd rather play solo.
See? This is what I dislike about the current move of all games to a micro-payment or monthly payment structure. I'm already shelling out $50 or more for the game and now I have to pay to play it, too? This is the reason it took me so long to jump into WoW in the first place and the only reason I kept doing that was because of the interactive social component. These other types of games won't have that.