Some of their games have over 1,000,000 downloads on the playstore and all of them have in game purchases.
Yep just noticed you can buy hints on F 47, these micro transaction are probably similar to payday loans whereas it sounds good as your dealing with small numbers(and you don't really take into account the massive interest) but when you add it up, 20 x say 0.80p really brings in the money, pretty sneaky stuff.

