Buying your traffic in my mind means paying you upfront, not a rev. share or CPA. I’m not really into dealing with 3rd parties for stuff like this. They all claim they pay more, but i’ve heard so many complaints here and at GPWA over the years of deals like this where they don’t track right or pay up at the end.
so, if you’re going to try, i’d require money upfront and make sure the people you’re dealing with are known to be honest.