Below are quotes from an article I read to explain "Trading Traffic":
"Traffic trading is one of those… and it's how 80% of my adult traffic was generated.
Currently, this is common practice in the adult industry alone simply because I don't think that other industries understand the concept or are somehow afraid of passing their traffic onto others.
The concept is simple, you send me a visitor and I send you one back
Generally, this occurs through popups, unders, and exit pops. You often see so many (14-20) on bigger sites because that's their way of passing traffic back to their partners that sent them traffic in the first place.
Now, before you get excited about this, you must understand that it takes a community to make this work… and content sites.
The traffic can be delivered to you via text links, pops (all flavors), links pages, etc."
I figured you guys would know how this works.