A few pieces of feedback on fabswingers from my own experience on it:
1) An average guy like me CAN meet women on there even going on as a single bloke - I've met 3 women so far on it. You actually don't need to look like a greek god and can have a degree of 'success' as a single bloke.
2) There are three main catches. Firstly, the women are not as hot as your average WG, at all. Maybe there is an 'elite' level available to men better looking than me or couples but within my bracket, you are looking at women over 40, likely to be BBWs. Second, you have to put quite a bit of time in befriending, chatting etc. Not everyone is going to want to bother with that if just looking for sex. Thirdly, even though it's supposedly no strings attached, the old adage 'you don't pay a prostitute for sex, you pay for her to leave' can come in to it. Emotions, attachment, all that shite.
So in short, my experiment with Fab is now over, as the only up side really is saving money and I guess a bit of an ego boost in knowing that you can still attract women if maybe you thought you'd lost it. But the downside greatly outweighs this - less attractive women, having to maintain 'friendships' that you might not want to maintain, worries about women getting the wrong idea and going all bunny boiler on you.
In short, I firmly believe, from my own experience, that punting beats chasing the fantasy of no strings attached with some gorgeous woman with an amazing personality who's well up for it, probably not going to happen.