Great shooter but iOS / Grossing are horrible

Been playing RF quit a bit and tried out all play modes: PvP, Co-Op, Survival, Campaign. Very good game although similar to other Glu cover type shooters but now with true PvP and co-op enhancement. Waiting for free roaming ability like CS:GO.

Downloads on Android are respectable.

But why so poor on iOS? Also, neither platform is making any money, meanwhile kill shot, the DH rip off, is still doing well??