If the feedback is esteem of students in the field, then you're rewarding the mentor who picks his battles carefully, who can sell what happened on any encounter in a positive and understandable light.

If I may: based on my minimal reading of PUA blogs & essays, I get the impression that picking battles carefully, & spinning losses, is exactly what is valuable about the techniques.

Consider the previously mentioned thesis: the author's brother was not interested in a goal like 'increasing, over the population of all females, the success of an approach' or 'learning how to pick up any girl', but rather something like 'how to get a reasonably attractive girl, period'. If the seduction techniques worked on only one girl in an entire bar (but infallibly), that'd be fine by them.

(I was particularly struck by one PUA who spent at least 2000 words discussing how to differentiate women who might sleep with him that night from 'princesses' who would require many dates and gifts before even considering sex.)