Very likely not. Only issue with Valve system is that consumer cannot get back their credit. Otherwise while their transaction taxes might be high everything is

Very likely not. Only issue with Valve system is that consumer cannot get back their credit. Otherwise while their transaction taxes might be high everything is clearly marked in local currency. You know exactly how much real currency you are paying and there is 1:1 mapping between various payment methods and to in game currency. There is no fake currency you can buy in varying sized bundles with opaque deals or discounts for larger purchases.