I don't really understand why people would go to such a site. Why not just go have an affair on any other dating site? Ones that specifically go to site for an affair ironically don't seem like the type of people you'd even want to date. Baffling.
Maybe they just find it easier when they know the other person is also cheating. Typically it's a bored man looking for a younger, single woman, that starts having demands later on. Here they could find a woman bored in her marriage that will just go back to it in the morning.