This site is distinct in the manner its members can view several sexually explicit photos of other members and since the signing up process is free, as a member you can search other profiles and browse through them. To progress further and make contact with any of them either through email, chat or video...

(Image Source: White Label Dating) There are quite a few independent site traffic ranking organisations such as Alexa, Nielsen, Compete, Hitwise, ABC and others. Most of the time they use different metrics to determine what site gets the most traffic but other times you can hardly tell the difference...