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).
They may be sold to a different owner who uses different standards or may engage in some of those shady practices to boost membership and use. You simply have to watch your back on any online dating site.
Always be wary of the signs of an internet dating scam.
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.
Stephen asks: "I am trying to find a 'real' adult dating site. The people on there either do not exist or are trumped up.