When we win money we don't break the scheme, how do you explain paying money to casino to place a bet? Isn't that exchange of cash to value? Well it might interest you to know that even though gambling case is different from the ones you are familiar with, they are still thesame. Just like paying money to render service and paying money to buy something, they are thesame. The gambling side is like paying money in exchange of opportunity, this opportunity determines the value. When you win it could be considered as value but if you lose its at your own risk. So no money is exchange for nothing, there must always be value for exchange of cash despite how it appears.