Yes, and it's closer to a 1:99 ratio than 50:50, making it pretty irresponsible to promote any if them here.
Some of the things that worked best would have sounded too ridiculous for any Mexican clinic to try to sell to anybody. In my position, I think you would have been glad for any new (and safe-ish) ideas to try out, too. I just wasn't interested in paying the fly-by-night clinics, I don't advise that. Openness (not of the wallet but the mind) worked very well for me. Just really, really slowly.
So I'm more of the "don't sit still" and "bring out the ideas," sort. 1/99 odds sounds damn good next to what I went through. So I don't mind people posting ideas here, it's an adult forum. Ish.