It only exists for money – CS GO Case Simulator Review

What they do is they make you want to get a knife, but you can only spend the in game money to get a knife unless you get exactly of the middle of the rare item square. So you want a knife, and you keep trying to get the in game money, then you are forced to watch ads, either to get cases, money, or items. Then they get money for the adds. :(
Review by ThisAppIsTheBiggestFail on CS GO Case Simulator.