Yes you may get your adsense account banned if you are rotating a site on a traffic exchange. The reason is it sometimes gives false hits. A couple of years ago when I first came into internet marketing I used traffic exchanges to help boost my alexa ranking. It worked. The quality of traffic you receive is very poor. Mostly freebie seekers. So use your imagination when posting to any of them.
i think using this kind of exchange traffic will be great help for us to increase the alexa rank without considering the quality of the traffic, and it also againt the adsense tos i think, i never use this in my adsense blog, if you want to search quality traffic, try to make a fan page on Facebook, and other social site, it will give you a huge impact for your traffic