I was calculating that based on an estimated 2 million North American users, since the 7.5 million number represents a lot of asian accounts, and most there are pay to play time cards at internet cafes. The bandwidth issue is less of a concern there.

With 2 million users x $15 a month, thats $30,000,000 in cash flow. So that 10 cents comes out to 0.6% of that. And that 10 cents is per month on 500mb of usage. Normally their patches only average maybe 100mb a month, only recently did they have a 500mb patch. The overall point here though is using companies that specialize in fast file transfers don't cost all that much in the grand scheme of things vs forcing users to deal with a peer to peer technology.