1. Facebook injected a viral app vaccine
Games on Facebook used to be like beggars in Assassin's Creed. As soon as users logged on, ten games would claw at their newsfeeds, jostling for position and begging for attention. Automatic updates from infected, err, interested friends were the primary way for the games to spread, since Facebook didn't have much of a central repository for trying new apps.
All that changed this summer, when Facebook introduced the App Center and clamped down on how talkative apps could be. The App Center, much like the iOS App Store, is an all-in-one destination for Facebook's various diversions. It even prioritizes recent apps over established ones, giving new games a chance at the spotlight. Novelty, good ratings from users (and yes, whoever is highest grossing) started to matter more for discovery than who could shout the loudest on the most news feeds. (Editor’s Note: Shouting is easier than making a good game.)