Facebook updates formula for active users, player numbers plummet

The company goes on to say that the one-time drop will result in a perceived decline in the number of active users of its many social games and apps, but the number of users actually engaging with the apps is unchanged. But that's just it: Regardless of whether the same rough portion of players have been "actively engaging" with games like CityVille this month, this still means that nearly 20 million people merely visited the app in the last month and did not play the game. And that goes for not just CityVille, but Facebook games across the board.