I've tried this product. It exacerbated my tennis elbow. I don't understand the "the our product was so successful we were forced to end trials" argument. How

I've tried this product. It exacerbated my tennis elbow. I don't understand the "the our product was so successful we were forced to end trials" argument. How long is the trial? 4 weeks? How big is the control group? 8 people? Is it really unethical to have the control group wait a few weeks to start using the effective treatment? This sounds like the exact argument that a snake oil salesman would use.