Bets a small amount and must win. Then it will be more profitable, because when we lose the gamble, we do not lose much money.
No assurance that you'll win by doing this. It is still a gamble even you'll bet with small amount. You can't just say "must" win by doing that. What I'm thinking is that you can promote and do affiliate marketing, promote your referral link with other gamblers. And once they deposit big capital to that casino, you have a portion of it.