This is such a scam.
I have been using cock rings for some time, and it is obvious how this thing ‘works’
Even a loose fitting cock ring will give you a fuller flaccid hang. When I wear a cock ring, my flaccid is fuller. My balls look bigger due to the ring ‘pushing’ them up. My spontaneous erections are sronger. I get morning wood, and my erections are thicker.
The ROP works in exactly the same way. You put anything around your dick and balls, if its tight enough to stay on - blood flow is going to be slightly restricted, resulting in a fuller penis.
The best way to test its TRUE affect on erections, flaccid hang etc would be to make one to goes soley around your nuts, and not around the shaft. I bet nothing will happen. Then, wear a ROP in the normal fashion, without the metals. You will have all the same effects, since its acting as a cock ring.