Much like the people selling courses on how to get rich from the stock market or house flipping on Youtube, they are making money from their audience rather than the thing they proclaim to be an expert in. If they really were banking so hard off of it, then they would be spending their type cashing in as much as possible and not chatting along trying to gain more followers. Nobody is winning long term from playing slot games, except for the casino, so they are either frittering away money hoping to make it back from pushing adverts to an audience or they are in cahoots with the casino in the most rigged manner possible. It amazes me that people find it interesting to follow along these boring, very static and staged graphics displays.