Nowhere did it say only 20% are helped. It says 20% more effective with other treatments. Either you're not reading or you're not comprehending.

I'm sorry therapy didn't work for you or you didn't want to try it, but I'm not sure what your agenda is.

You seem to have some weird axe to grind about people making money. I'm not sure what else I can say as you seem to want to believe the whole thing's a big rip-off. Like where does the claim that untrained listeners are as good as trained ones come from?