Virtually all the girls who have reached out to me first locally were hookers, and not very good ones at that, (otherwise, I'd be happy as I still like hookers) and I have ZERO interest in any woman living hundreds or thousands of miles away.
I believe most of the women from out of the country are either cam girls, or women trolling the boards looking for that "Whale" who takes a fancy to them, and I suppose there are a few other types of scamsters thrown in the mix. One of the scams I have run into a few times are women, very attractive women, who want to meet up very quickly with literally no back and forth or "vetting" of any kind on their part, you know the "too good to be true" type of message we all get from time to time but just before the actual meet is confirmed they want you to join some kind of "online web verification" service. I am not sure what the actual scam is, I suspect it's a phishing scam, but I have never been able to force myself into actually clicking on the link they provide. I am CERTAIN it's a scam, but exactly what kind of scam it is I am not quite certain.
As for the credibility of SA itself, I can vouch for the site, I have seen a few dozen different POT SB's and have very rarely not ended up in bed with the women I actually meet. I live in a very small city, about 100,000 in population and I can get enough action on SA to get laid virtually every day, which is pretty much what I am going for as I am kind of a pig where it comes to sex. I have a VERY healthy libido. I am sure that someone living in LA could quite easily get five dates a day, every day, for the rest of his life without ever having to repeat with the same girl twice if he so chose. You have literally thousands of women within just a few miles from you with more signing up each and every day.
All I can say about the fakes, scams, and mail order brides you will here from every day is to just skip over them and concentrate on the local women, If they "view" you first, I take that as a good sign. If they "favorite" you, that's an even better sign, but if they contact you first, I would advise using caution. There are a lot of hookers, catfishers and scamsters out there, the good ones don't have to make the first move.