For those saying that "what about lag" remember that people didn't believe that Arena Net could make a game (Guild Wars) completely online and make money either, and guess what, they did. There are things that can be done to reduce bandwidth required and I don't doubt that the guys at Zipper did take a good long look at Guild Wars which you can play even if you have a dial up modem. And there are numerous other games out there that are free to download and free to play that make money as well.