Even if that is true, I have warned members here about the Bestchange site being involved in fraud and stealing some of their clients' money.

Even worse, I do not imagine to promote a site that is involved in the theft of client money and is distributed to sig participants, and given to sig participants' wives and children to enjoy money.
People who are victims of fraud will certainly swear, this will be contagious effect for those who eat stolen money.

I have a hunch, they will pay participants in the first week, like I mentioned above, or vice versa as you said.