Ask HN: please review my startup idea: a traffic marketplace

The idea is this: in the media/publishing world, ~everyone does traffic deals where I send you X clicks/month, and you send X back. We both get more unique visitors, and the same amount of pageviews. We both win, and expose more people to our sites, who may become regulars. Additionally, Outbrain and competitors monetize outgoing traffic. And people buy traffic at about 0.04c/click (prices vary). This is in effect an existing marketplace for outgoing traffic. But it's inefficient. Middlemen take a 40-50% cut when money is involved (when buying/selling traffic), and when it's a free exchange, it's all done manually and inefficiently with no good tools (except homegrown ones here and there). I propose to create a Saas marketplace tool that: 1. Makes free traffic swaps much more efficient/automates it to some degree. 2. Makes selling and buying traffic much more efficient (and takes a lower/more reasonable cut). Harsh feedback welcome :)