Sex Play is a great site that clearly defines it purpose; to help consenting adults meet each other for great webcam sex.
The site is a true playground for open minded adults looking to hookup using Skype, or even in person.
The good news is that these models sometimes say thanks by treating everyone to a titty flashing or invite the tipper for a private masturbation show.
The downside is that there are also models who only work the public chats.
The service is called Sky Private and you can find a list of their girls in the Sky Private Model Directory.