Some greedy people will be fooled and attracted to such signals, but not those who gamble for entertainment. People who believe in premium signals as mentioned are usually those who only gamble for money, but in the end they are cheated instead of winning the bet. They are too greedy and lazy to do some analysis, that is not exemplary behavior.
Some of them might be greedy, and some others might be just curious about how it works. The rest are newbies who do not have any idea of crypto casinos and probably this is the first time they have the ads on Facebook, or Instagram. Let's say you and I don't know anything about gambling and one day we see the ads that it's possible to make money with their signals. It's very much possible that we will fall for that trap and try to figure out what is going on.
Every day crypto newbies will born and the loop will continue till the end of the world. Just like how newborn babies come to this world. People decide to learn about crypto and gambling at some point and most crypto newbie fall for scams at some point.