Well, no.. because it makes zero sense. Even if you were to act like casinos were some kind of pointless business endeavor with no desire to make a profit - which goes against the whole logic of creating a for profit business, then you are still left with one or even two obvious issues with 100% RTP. Firstly, why are you even playing if you expect to just get all your money back in an infinite loop because surely you wouldn't expect the casino to ever pay you out so you out if they have no chance of earning a profit either? Which connects somewhat with the second point - a casino, even an online one, has all sorts of costs and expenses that they are required to pay - bills - to even keep these platforms running, but there is no ability to pay these if their customers are not providing an income in the form of 99/98/97% RTP..