Bybee was a working physicist, not a seller of snake oil ... Audio became his hobby ...I doubt that he will sell bullshit...
I never buy one because i did not have money for that in a low cost system , but inspired by him i made my own "tweaks" ...
It is useless to mock someone you did not know about nor any of his products on the basis of your own blinders and faith by the way .,..
Same effect as those stick-on-the-wall wooden mpingo discs.