I think the Zynga acquisition had something to do with the peak.
Social network fatigue started a couple of years ago. That doesn't mean people are ready to ditch social networks outright, but it means that the stupidest abuses are going to leave a sour taste in peoples' mouths, and Zynga is so well associated with these behaviors that, even if people like some of their games, no one likes them.
Zynga's asset is that they understand addictive behavior and are probably the world's leading experts in a specific niche, which is the online delivery of addictive (not always high-quality) games through social media, and the monetization thereof. This knowledge is going to be valuable no matter what happens in social media over the next 5 years. Their brand and reputation are decidedly NOT assets. The opposite, actually.
If Zynga's executive team is smart, they're going to stop being a primary publisher and acquirer and start working behind the scenes, like a consultant, using their knowledge without doing brand-damage to the games they work on, because even though 90% of people don't care about a game company's reputation, the people who set trends do, and by 2014 no one will play Zynga games.
Zynga didn't buy every other game this year and yet substantially all will have a growth curve shaped like that, with the main question being height at peak. I also think that zynga would lose in the poll "Who makes FarmVille?" to Facebook, Google, Microsoft, and Kim kardashian, even of you asked active paying players of it rather than regular people.
Zynga bought OMGPOP on March 21. 10 days later it hit a peak. I'm not sure you can correlate the fall with Zynga. The unfortunate part of this graph and story is we don't know what user growth looked like prior to April 1, so drawing any conclusions about Zynga's effect on the game is hard to do.
Social network fatigue started a couple of years ago. That doesn't mean people are ready to ditch social networks outright, but it means that the stupidest abuses are going to leave a sour taste in peoples' mouths, and Zynga is so well associated with these behaviors that, even if people like some of their games, no one likes them.
Zynga's asset is that they understand addictive behavior and are probably the world's leading experts in a specific niche, which is the online delivery of addictive (not always high-quality) games through social media, and the monetization thereof. This knowledge is going to be valuable no matter what happens in social media over the next 5 years. Their brand and reputation are decidedly NOT assets. The opposite, actually.
If Zynga's executive team is smart, they're going to stop being a primary publisher and acquirer and start working behind the scenes, like a consultant, using their knowledge without doing brand-damage to the games they work on, because even though 90% of people don't care about a game company's reputation, the people who set trends do, and by 2014 no one will play Zynga games.