To get top 10 in the U.S., you need 80,000 downloads, mostly in the previous 24 hours. Once you’re there, of course, Apple’s own “app discovery” effect kicks in as users see you featured on the front page of the app store … and you tend to stay there.
Mobile app marketing company TradeMob — the largest app marketing platform in the world — says it works with 80 different app discovery partners. Most of them say that AppGratis just became too big for its britches (or Apple’s) and was culled simply for that reason. And most of them are still providing free or discounted apps, with 60 percent of them feeling “perfectly safe” that their app will not be deleted.