Of the supporters of PUA I've read, they break down into two groups - single men and married women. (Married men don't seem to write about PUA, although given that married women do, presumably there are some who have picked up its ideas and simply don't add to the discussion.)

So apparently a lot of women appreciate being "Gamed" in long-term relationships as well, and appreciate the changes in attitude from guys who switch to it. No idea about the statistics. "Alpha attitudes" preclude jealousy, dependency, and insecurity, all attitudes which tend to be destructive. There seem to be a lot of threads on PUA forums about how to maintain a facade of confidence and security going into a LTR. Heh. The major failing point of PUA - it more frequently teaches guys how to pretend to be confident, independent and secure in themselves than how to -be- confident, independent and secure in themselves. For some people, that's enough; they become what they see themselves as. For others, not so much.

Some aspects of it have been useful in my personal life - simply recognizing that neediness was an unattractive element. I had previously expected, incorrectly, that women wanted to be needed. Distinguishing neediness from desire was helpful.

So there are some elements there that are helpful. Unfortunately, Sturgeon's Law applies.