That's what Anne Hunter, vice president-advertising effectiveness products at comScore just revealed at OMMA Ad Nets.
She says the percentage of online users who never click on an ad during a
given month is actually increasing, not decreasing. In July 2007, she says, the percentage was 68%. Currently, it's about 84%.
The problem for ad network folks, she says, is they still base
their audience value largely on whether people click, or not.