Arbusers

Hi there! Im new in the site and everything seems to go well with my arbs. What I don't understand is the bookies that called exchanges bookies, I know how it goes but my question is. if i bet my maximum stake in this bookie they gonna pay me full? Im asking because the competition there is not with the bookie but with the users..if the money is not enough in this game to pay me..whats is gonna happen?