~snip~
We can't tell if how those streamers set it up, but one thing is for sure,
They are doing it to attract gamblers to use their referrals and bring more people to use the site. It will bring them viewers
plus the ref bonus that they will going to receive from the casino itself, meaning to say, whatever it is money will flow for
them, that's what matter for them and they will continue to seek for those followers to earn more.
Absolutely.
It's like when you see a celebrity sponsoring a product. They most probably have never heard about it before and they are just doing it for the money, obviously.
People tend to buy things from people they trust, that's the whole point of "brand ambassadors" and things like that. Youtubers are doing the same, but in a more niche, localized way.