Does anyone know of an up-to-date analysis of the iOS app store ranking algorithm? I've seen first hand how ratings can move an app up the list, but I've never noticed engagement or sales having an impact.
Apple keeps it very close to the chest, a lot like Google does with their algorithms. If people know what makes rankings rise and fall, they'll inevitably find a way to game the system. The only things I've seen that definitively affect rankings is downloads and ratings. Sales affect the top grossing rankings only.