The streamer just works based on statistics. He doesn't consider all the viewers in a row to be fools, but he is sure that a large proportion of gullible simpletons will fall for the bait. That's what happens. Therefore, no matter how blatantly false a stream may be, it will always have a target audience, and therefore such fraudulent advertising will be profitable. Even here on the forum, where there is a more experienced audience, there are posts by completely brazen scammers who essentially act according to the same algorithm as the streamers discussed in this thread..