On sports betting sites it is quite common for winning players to be banned simply for that, for being winners. It is something that fortunately does not happen to winning poker players and I have talked about it in another thread but I think it is not enough to refer to this thread without further explanation to say that he is a scammer. In any case for me the scammers are the sports betting houses who I do not know how they are allowed to do this. To me it should be illegal to ban winning players from playing.
Yeah. I wouldn't call him a scammer easily, but the manner in which he is trying to sell his services isn't doing him any favours to be honest. Also, it's totally understandable why sportsbetting sites ban winning players.
They are businesses after all which is why their survival is their first priority. Sucks for the winners though, but it is what it is.