I tried AFF, but for my personal life only - i.e. not business.
I found perhaps 2 decent guys out of probably 50 odd responses, most of whom were married and just wanted a quick shag.
I have heard the dating sites are a way some WGs operate, however I wouldn't use it because it simply isn't professional.
For all the hassle you would get, I also don't think it's worth it. Most were guys sending me photos of their cocks, with one line "I'm in town tomorrow can we meet for sex". I'd actually stated in my profile I was looking for a potential relationship, and needed to get on with a guy before going any further.
When I said I needed more info, time they just would say I was being unreasonable. Wouldn't like to think how they would have reacted if I'd told them how much it would be - then again they might have gone for it!
By the way, a guy who wasted my time with emails, msn messages etc when I first started was also on MSN and he started messing around in exactly the same way - makes you wonder doesn't it.