Zynga's taking advantage of human psychology to abuse their customers who have been playing their games for a long time. I didn't realize this until working thi

Zynga's taking advantage of human psychology to abuse their customers who have been playing their games for a long time. I didn't realize this until working this out while responding to your post: By killing off the oldest games, Zynga causes a significant segment of its customer base to substitute newer games for the older ones. These customers are probably the most profitable (they likely buy stuff in game), and they will likely make purchases in the new games as well. This has another benefit for Zynga in that it lets them play games with the user metrics for their newest titles (thus making the stock holders happy). Having a long-time customer start playing a new/trending game is just as good as (or better than, see above) a brand new customer.