Just adding my experience fwiw....
Registered free account. Didn't fill in profile and left it to see what happened. After a while, I had about 6 Friend requests and a couple of 'wants to meet'. (Really.. with no photo and no profile info!?).
A good trick is to get their profile pic and drag onto google image search. You'll see them come up all over the place. Mainly american. Had a few from amateur sites too lol. Saw the 'rest' of the photos

.
Also look out for clues in the pics etc. i'm in UK. So spotting left hand drive cars in the background, american brands in the background, people referencing 'stick shifts' etc and claiming to be in a local town near me is a dead giveaway.
There 'may' be legit users on there, but it's obviously a tactic they employ to get people to bite and pay the subscription.
I might adopt the tactic I saw a fr use lol. Pic of him naked on his phone. Shows it to girls, asks 'what dya think of that eh? (wink)'. Most are disgusted but the odd few (and there actually were!) weren't disgusted, and then, well, there's no messing about after that really. Wish I had the balls. Metaphorically speaking ofc.