I heard about a similar trick once in the framework of a scam, which may be the same (I'm not willing to watch this much youtube for the payoff), where out of the 1,000 people that reached out for answers to a 50/50 bet of some sort, they provided 50% of them one answer, and 50% the other. Out of the 50% that won, they provided 50% one answer and 50% another. Leading to a situation where eventually you had a small group of people who had received correct "lottery" or whatever answers five or six times in a row, priming them to believe the scammer had some major advantage. Then the scammer charged that last group of 15 or 30 some large amount of money to receive the last answer, and so on with the winners of that bet.