Did you know that casinos can set certain users to have continuous wins? i don't know about it. I often watch slot streamers on YouTube, and I watch it live, they also lose a lot before the wins come. But I'm not sure if the streamers use real money because they have a balance of about $3000 every live and it happens every day. I don't believe anyone can gamble with that kind of money on a daily basis, unless it's just a bogus balance given out by the casino. What's more, slot games are greedy for money, depleting our bankroll very quickly
Now those are my suspicions but in truth this could be proven if we made an effort to do so, this could be done by checking all their streams and then gather all their results and then determine if those are results they could have gotten by chance, and if this is not the case then we could determine how unlikely it was for them to experiment those results.