"Historically we have seen usage decline during the end of an expansion cycle. We saw a similar drop in subscribers in the months before 'Cataclysm' followed by a substantial number of returning players around the 'Cataclysm' launch. " Morhaime also said players were taking a break from "WoW" to play "Diablo III," which launched to record breaking numbers on May 15. The game beat "Cataclysm" to become the fastest selling PC game of all time, selling 3.5 million copies in 24 hours. Blizzard said Thursday more than 10 million had played "Diablo III" through July. Activision Blizzard pulled in $1.08 billion for the quarter with $220 million from subscriptions, including those for "WoW." That's down from $1.15 billion a year ago and $359 million in subscription revenue, though there was an $11 million reduction in revenue included this quarter to correct an accounting error. Blizzard alone pulled in $634 million for the period.