The point is that there are no warnings anywhere that the game we watch on video or stream is for fake money.
Of course, are shown in public the videos in which someone wins. A person who has no gambling experience when watching something like this thinks winning is very easy. If he can be persuaded to make a deposit, he usually loses everything. That's why it's so dangerous.
You should always assume that when you are seeing a streamer or an online personality being sponsored, that they're taken care of and that they already have games in the bag because the sponsors want them to win and create the illusion that you can do it too. It's not new and advertisements are meant to deceive after all, I mean the 50s introduced cigarettes as a medical paraphernalia by advertising.