I agree with you but you shouldn't forget that most viewers of this kind of videos are very young and one part of them is not adult. Then there is a need to find a way to prevent them from being abused by those scammy/fake demos.
And this is the problem, if the audience of those kind of channels were people that knew that this kind of promotion is not real then there will not be such a huge issue, but many of those watching that type of advertising are people that do not have the experience necessary to know that what they are seeing is not real, and since they trust the streamer they try their luck in a casino due to that publicity thinking winning is as easy as what they saw in the video only to realize too late this is not the case.
yep, they believe too much in the schemes run by streamers and game developers who have worked together before.
besides envy and greed for what other people do is another cause.
when they watch they believe too much and they want to get the same thing the streamer received but that is an impossibility to get.
the opportunity may exist, but not great