as strange as it may seem, when people get into the business of earning money with referrals they don't put the earnings they get with their referrals to play at the casino, that's because people have already realized that they won't get much profit, if you look at the guys from the youtube or twitch channels they keep talking about gambling, they get a lot of referrals, they even show that they play in the casinos, but in fact many of them don't play much with their pocket money, what they are doing is simply disclosing casinos and show people the steps to create an account and how to deposit, play and withdraw

but those guys who have been getting a lot of referrals don't spend all their money at the casino, they have experience and they know that gambling is not profitable, that's why they are in the business of referrals which is one of the few ways to make a profit with gambling, there are only 4 ways to profit from gambling which are: owning the casino, being a casino employee, getting referrals or being sponsored by the casino. Apart from these 4 options I don't see any other options, you can search this and you will reach the same conclusion I reached, of course there are some very lucky guys who buy a lottery ticket for 1$ and win millions of dollars