The work of such streamers is to create the illusion that it is very easy to win, I often see in YouTube shorts how streamers of model appearance spin the slots and of course they are happy to provide their affiliate link. The earnings are double since donations from viewers and those who followed the affiliate link and make deposits and they have their share of it, which surprises me every time that this type of streamers have a lot of people watching the stream, which means this scheme works and will be relevant for a long time.
That is one of the goals of streamers who gamble with the aim of making a win that will attract many people who watch it. I also think they get benefits from more than one source because with those who get a lot of fans it can make them profit, not to mention those who get a lot of followers, that is also one of the benefits that they can use again in the future.
They do this to definitely get benefits, but it's been a long time since I saw them gambling live with a plain face without any barriers, lately I've seen streamers who gamble but with their faces covered like wearing masks, maybe there's something else they're guarding.