The prices you see are from publishers who are using isocket. We give publishers the flexibility to package and price their inventory the way they want. The longer list of URLs are other sites that we've identified as good targets for premium advertising, but we don't list their ad prices.

How do you determine the cost of these ads? Are you manually going in to all the websites and checking the quotes?

Thanks. Publishers have accounts through www.isocket.com where they slice and dice their ad packages. It's totally up to them, they configure it their way with their pricing. So for example, Cheezburger chose to sell a $6 CPM medium rectangle.