Apple's facing a growing problem on its App Store platform: ranking manipulation. While a lot of the spotlight areas are curated by humans, the rankings are generally not. Instead, computer-driven algorithms determine where each app falls in the various rankings for the store and each section.
Ranking position can often mean the difference between making or losing money for a lot of developers. As a result, there are ways for developers to manipulate those rankings, ranging from the generally acceptable (asking customers to rate the app highly if they like it), to the not-so-much (hiring networks of computers to log in and download or leave ratings for an app). Some of this manipulation is essentially an o