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.
That is already his problem but despite of it, he is still here trying his luck. This is not the first service anyway that I see and for sure this isn't going to be the last as well. Maybe they only need a better presentation and they better post a solid proof in their thread, not that they will hide it.
Their shady approach has nothing to do on why a sports betting site ban players but the last thing that you said is the true reason for it. Maybe skilled bettors only came up with a service like this because this has no restrictions and they can earn unlimited amounts in here if they get lucky compared to when they bet. They will only get frustrated there.