I didn't say that $15 a month for 6000 people was $250,000. I said the bandwidth might be. And the quote you found confirmed that. I can garuntee you that blizzard is not paying for a 20 year contract. 2 year, maybe, 5 year possibly.
So lets say prices have fallen to 1/4th now (its been about 4 years). Thats still about $60,000 for an OC 192. That would be 2/3s of income just for bandwidth. We haven't even started counting server costs, or the development cost, or anything else.
All I'm saying is, blizzard isn't making 50% profit. Probably not even 25% profit either. MS might be, but blizzard isn't. They ARE making a decent profit, I'm not denying that, but I'm saying that $15 a month a large majority is not pure profit.
Thats why a bunch of MMORPG's have gone down the tubes, they looked only at the lure of monthy payments and didn't have a realistic view of the actual costs of making, developing, and maintaining.. And thats not even considering if it sells or not.