I believe that most X-10 ads are bought on a CPA (cost-per-action) basis as opposed to CPC (cost-per-click) or CPM (cost-per-thousand).
This means that the site (publisher) only gets paid if a user clicks on the ad and then actually buys a X-10 product, or signs up for a newsletter or some other action - similar to an affiliate program.
Since there is such an over-supply of ad inventory on the internet, sites accept the X-10 CPA ads to fill their unsold inventory; some revenue potential is better than none.
justin Australian join:1999-05-28 New York, NY kudos:7
comments? yahoo must be doing worse than they let on if they are scrounging around for a few bucks in action by spamming (sorry) all their users with pop-unders.. cost per action is nice for x10, nice for yahoo, sucks for readers.
reply to rjp123 any site that has pop-unders I just add to my internet explorer's 'restricted sites' ... that way I rarely see those damn things because they aren't allowed to pop-up. The only drawback is if I need to somehow log on to the site, I can't do that either if its restricted in my browser...
