Yes you got the right point  and that's  how business is began. And if this system did not exist, how would the casinos cover their costs? And I also agree that bringing a large amount Prize  will not reduce the owners money besides I think it will increase the money. When gamblers see the opportunity to win such a large prize for a small amount of money, many will want to take this opportunity and I think that this will increase the number of tickets sold. And since gambling is a matter of luck, common people can test their luck with low risk.