I once read a thread about someone who bet millions of dollars just because of a small profit with low odds of no more than 1.05 and he was sure he would win and could win the match, but in the end he lost, learn from that experience so you don't easily trust other people when betting , even though the results are told by someone or even the dealer, so the most important thing is to play with your own analysis at your own risk because even if it is 100% accurate I will not bet on anyone's words
that reminds me of same thing mate and yes now I come to idea that maybe that same person who tries to believe in fixed match that is why with so low odds he still manage to ben and lose?
but lets go back to the OP's question in which I find it truly hypothetic because it is impossible for an assurance of having fixed match to be offered to us.
even millionaires failed on this event like what you mentioned.