Picking up the slack for the sub loss are Blizzard’s other titles, most notably Hearthstone and Diablo III. Hearthstone recently crossed the 30 million player threshold, while Diablo III recently began its Chinese beta and has already netted over a million in sales from that market.
By diversifying, Blizzard is pulling away from relying as strongly on World of Warcraft as its primary money-maker. Non-World of Warcraft titles accounted for 40% of the studio’s revenue in 2014, a number that is expected to rise to 50% for this year.[Source: Eurogamer]