Guys, if someone would fix a game the information surely wouldn't become public. The fewer people know about it the better.
Of course no one is out of his mind to make the fixed game in public it is done privately and secretly and only few people in the circle will know that it's fixed, no one will relay this information to a potential whistle blower, and it will ruin everything and will get all the people who knows this game fixing in trouble, because it's against the law.
That's the point you don't trust people selling fix game, they can scam some people but not the many as a very simple logic, you would only know that it's just a scam and trying to fool us gamblers. Selling fix game information might be available in a group of syndicate but not in the usual world or the public.