AdultFriendFinder has been very good to me, but there are issues.
I used it for a few years, before ending about three years ago, so my experience may be outdated. I also noted that over that time the place was becoming more overrun with ads for women that really turned out to be ads for cam sites, porn sites, and I believe a provider or two. Add to that the fact that men outnumber women about fifteen to one and the following facts should make sense.
It is very time-consuming. You have to send out a lot of e-mails in order to get a reply or two. I developed one long letter, from which I would cut and paste and add in stuff specific to the addressee. That saved some time.
It helps if you have a hook. I made sure the stuff I sent out was well-written, passionate, intelligent, sensitive, and tinged with a little more than a hint of danger and dominance. I found that got a lot of the right ones interested; those seeking something different than hubby.
We're still talking about a lot of work, here. First there is the composing, then the tailored mass-mailings, then the discourse, then the sorting out who is real, reasonable looking, not insane, and willing to meet.
You also have to strike first, which means watching for the new members in your area, in order to e-mail them before they open up their box and find 176 e-mails from sweaty, horny men. Then you have to get them to meet and hope they like you.
Don't get me wrong, I met some smoking hot women there and young ones too. But I hate to say it; I have a few things going for me, or at least I did in those days. Even given that, it was a huge investment of time and energy, that was worth it once I had developed a little stable. But I'd hate to do all that leg work all over again.
Here the investment is money, and a lot less time -- to do the reading/research that this site provides inexpensively. And as a friend of mine says, "I don't pay women to come over. I pay them to leave." I had one or two of those AFF girls who made themselves into a bit of a problem. Some of them also have husbands.
All in all, I am happier here.