Are you sure? Doing a quick google search says that Activision made $1billion dollars profit in 2011 and 1.1 billion in 2012.
http://www.gamespot.com/news/activision-blizzard-profits-hit-11-billion-in-2012-6403613
Yes -- Activision is easily the success story of the bunch. Take 2 and EA lost significantly on the other end. Ubisoft is net positive but not by a large amount. The next biggest publisher coming in to this generation, THQ, is now completely out of business.
Consider a quarter, for example, where EA makes money,but Take 2 loses some. Activision runs a good profit but Ubisoft runs a moderate loss. The net total would presumably be a moderate profit. In the PS1 and PS2 days, all of these companies were growing simultaneously; now they grow at each other's expense. That suggests growth has significantly slowed or stalled.