Forum Moderators: martinibuster
Hope that makes sense.
Ask AdSense.
I suspect that if it's general expired domain traffic, traffic that is untargeted to your website's topic, then it's junk unfiltered traffic of discomfited visitors and therefore such traffic buys are or ought to be prohibited.
1. "Domain parking" is allowed because Google can target ads to the domain name. But if you redirect domain traffic to a different site then the traffic will inevitably be untargeted and useless. Not to mention discomfited (thanks for the word, Webwork).
2. Look at the small print these companies have in their contracts. For the sites I have looked at, not all the traffic is from expired domains. Even the small print may not fully disclose how much of the traffic actually comes from less ethical forms of traffic-building such as spyware, popunders, blind links, etc.