Unless he has any kind of actual, concrete proof, I would think that he is just a disgruntled gambler who lost all of his money because he could not stop himself. Or he did something against the terms of service of the online casino. And now his account is banned and he cannot do anything.
He never said anything about his account being blocked, according to him he participated in the survey campaign organized by bc.game and after receiving his reward he was asked to wager it 60 times which I believe he’s not saying the truth.
He hasn’t said anything after calling the site a scam for making him wager everything he got, so I believe his post should be taken with a grain of salt – and like you said without any evidence of him being cheated his words means nothing.
I was questioning his reason for spreading fake news, not his fake news, since his claim does not have the majority consensus of the public Bitcointalk community. In other words, most people on this thread do not give OP the benefit of the doubt. At least not without sufficient evidence.
You are correct in saying to take his story with a grain of salt. Everything should be.