Gambling were made to make you believe that you can win and earn something,usually who earns always is the house ,the owner some get profit and most users loose all or part of their money at it.The fact is doing dice or betting may lead into a deep loss in a short time the thing i will win again and recover and withdraw wont happen won again then put all again and done,all balance gone.
That it correct. These sites are designed to make profits for them self not for players. If most of the players start earning profits from these sites then how these sites can survive for long time and how they can spend money for advertising their service?
They know finally they are the winner in this game so they spend so much money for advertising to attract more people to their sites.