From Kotaku:

EA Sports’ Dave Littman – producer on NHL at EA Canada – has told us that “The average EA SPORTS gamer spends 200 to 300 hours playing their favorite sports game each year”. That figure is a combination of both online and offline play. And is for just one game.

With a devoted userbase like that on sports games, it s no wonder companies like EA are now charging for everything from an elite Madden mode to in-game powerups. We just think this lends to our argument of sports games being ripe for a subscription play.