nice that you mention this game.
a few months ago someone called who had problems with their Ipad.
they brought it in and the only thing I could do was a full reset to default.
all went well and I took it back.
1 or 2 days later that woman called and said that their kid wasted €400+ (real) euros in that game that you mention without realising it.
if it's all that tricky made then I guess it's easy to earn a lot of money (2 Mill seems extremely much tho)