If anyone is paying for reviews, no matter if someone tests out their product or not (since it's not really organic traffic, is it), I think there is a high likelihood that he is forced to do so because he has no other way of getting attention for their product.
This usually infers that their product is garbage, or has significant problems.
He hasn't scammed anyone just yet so this thread rightfully belongs in reputation. However, by the looks of it, it wouldn't be very surprising if he does scam someone with his "method" in the future.