ValueClick

ValueClick is a pay-per-click advertising network, meaning advertisers pay only for click-throughs to their Web site, not for impressions or page views.

The network currently has 11,000 sites as hosts. Hosts are paid each time a user clicks on an advertisers' banner. ValueClick hosts earn up to 17 cents per click through, and have access to real-time reporting of impressions and click-throughs.

Minimum buys on the ValueClick network are $2,000. All $2,000 buys must run within a period of two weeks. ValueClick offers 14 distinct categories on its network for targeting purposes.