You actually haven't looked into it at all. Read The Game.
The goals of most members are to get a girlfriend and have a healthy relationship. However, in the past they've had abysmal luck with women. My point is that lonely men, who are emotionally damaged and looking for a way to change what they've been getting, find the PUA community. It offers a pretty compelling siren song for some men.
To men like that, unhealthy, purely sex driven relationships are head and shoulders superior to nothing at all. There's a distinct lack of support for men like that too. What's your first reaction if a man was 30 and told you he'd never had a girlfriend? If you're like most people, you'd probably think he was a weirdo and not want to associate with him... or at least offer your (unsolicited) opinion of what he was doing wrong when he might not be comfortable with that. Or you'll say "there's plenty of fish" or "someone for everyone" or some such meaningless drivel.
Well, the PUA community accepts him. Are you surprised when such people turn out emotionally unhealthy?
I've been there. Their tactics work. And it is a thousand times better than simply being lonely. My issue is it's more of a cult (Appealing to the disenfranchised as a way to find community is how just about every cult in history starts off) and didn't lead me to what I really wanted.
If you asked a lonely late-20s guy whether they'd prefer being labeled a misogynist while getting laid or a nice guy who never gets a girlfriend... they'll pick the misogynist. Every time. I'm pretty confident in using an absolute there, too.
---------- Post added 2012-10-10 at 11:13 PM ----------
No, I'm saying that when women are honest about it, their position is unassailable. When they just string a guy along even though he's made his feelings obvious (at least at one point), their "just being nice" turns into "unintentional cruelty".