I'd say it's mostly a scam. Definitely fake profiles. I set up a second, fake account on a different email address and tried contacting some of the same women (via wink, i wasn't going to pay to test this theory).
When the same results happened with the second account, as the first, with certain women, i knew the fix was in. I wink'd three women in December. they all replied back quickly. when i sent messages, i never got a response. so about 2-3 months later, opened new account, winked same women, same, collect reply sent within 12 hours. i actually emailed AM, they didn't reply for about 5 business days, used same canned "please feel free to report all fake accounts" email, and gave me 30 bonus credits "for taking so long to reply" ... more like, they knew i was on to them, and just added to shut me up.
but that being said, i had a 6-month affair with a local woman, from the site. she was very, very real. and i've exchanged private email addresses and texting with a few other women, so i know it's legit, but, i'd say, barely.
i'd give it a "barely legit." in that they make the site appear much more populated by women, by using fake profiles. it can be difficult to weed out the fakes, IMO.
i also get a lot of random winks/messages from women all over the US, nowhere near where i live in canada.
i started winking at women to gauge interest, and then if they reply, i check to see if they even looked at my profile. that's how i decide if i should send them a message or not. also, keep your mind on how long you've been seeing these profiles showing up, and how often they're "i'm online!" shows up. honestly i can't imagine that many women regularly signing on for months and months at a time.