I play World of Warcraft about 2 hours a night roughly 5 or 6 nights a week. That is probably a little high but lets go with 2 hours at 6 days for ease of math.
That means I play 48 hours a month at $15 a month. So I am paying about $0.31 an hour. In China where they actually pay by the hour it's 0.45 Yaun an hour, that is roughly $0.06 an hour.
I am paying $0.25 more an hour than people in China to play WoW. For $15 I could buy 107 Chinese Yaun which would translate into 238 gaming hours... nearly 5 months of playtime at my current rate and honestly I feel I play to much.
(check my math http://www.x-rates.com/d/CNY/table.html)