One thing to consider is that the creators might very well believe it works themselves.
It's easy to fool yourself into believing something you want to believe. They might even have done some informal, poorly structured tests and gotten the results they were expecting for other reasons, reinforcing their beliefs. Hell, I've done this to myself (ie when debugging) so I can totally empathize.
It's easy to fool yourself into believing something you want to believe. They might even have done some informal, poorly structured tests and gotten the results they were expecting for other reasons, reinforcing their beliefs. Hell, I've done this to myself (ie when debugging) so I can totally empathize.