Ive experience just only twice i made a bet of only 500$ for a capital make a continuously run for 10$ every game and i didn't expect that i will get a huge amount of wins just around 1k usd only even tho its 1k usd still a large amount for me that can sustain my gambling activity for a over a month but after that wins i didnt take any risk anymore due to economic crisis needs for funds, but i keep seeing streamers have this large profit but we cannot deny sometimes its not their money so its hard to trust they didnt spend alot of money on these casino.
It's not necessary that every streamer should be gambling with the money given by the casino itself, but in most cases, it's true, especially if the streamer is a partner of the casino that they are using on their livestream. Casinos provide their partner streamers and content creators with credit that they can use for their streams and videos to entertain the audience and show what platform they are using so that people from audience also choose them as their gambling platform.
Some streamers and content creators actually use their own money, and they don't advertise certain casino platforms and even if they do, it's just for the affiliate commissions and not because of some partnership with the platform. So, basically, some of them do risk their own money to entertain their audience because they also earn money by creating the content.