Are you looking for an adult dating site that caters to adult encounters or casual sex, that isn't full of scammers or fake profiles?
If that's the case, I'll admit it's pretty hard to find.
My first recommendation would be to try Lavalife's Intimate Encounters section; you sign up with them and then decide which of the three sections you want to be a part of (Dating, Relationships or Intimate Encounters).
It's pretty hard for any site these days (especially the big ones) to stop fake profiles and scammers from signing up, but I think I get what you're after.
There are a lot of adult dating sites that don't have a lot of users, or use sneaky marketing tactics like the bait and switch you're referring to.
We can all help keep each other safe by reporting dating scams.
These recommendations are just for a snapshot in time.
You might want to even consider mentioning the lack of a picture - not in an accusatory manner, but an direct simple statement, like, “I was hesitant about emailing someone without a picture, but I’m surprised by the fact that someone else likes badminton!