You are completely correct. Hiclones are nothing but a scam and cannot possibly work as claimed.
But when I pointed that out I was banned for a week.
Opinion without experience will provide that conclusion. the "scam" and "sham" seem to be easy words. try "test" and and "evaluate". if the manufacturer has such long success and little returns fro the money back guarantee, then this may also need to be considered. I am a licenced mechanic and not a back yard fitter either