europeforvisitors - 2:03 pm on Nov 14, 2007 (gmt 0)

When "smart pricing" was introduced several years ago, Google used examples of pages that were considered likely or less likely to convert:

"Likely" was a camera review.

"Less likely" was a page of photo tips.

That doesn't mean that everyone with a photography site should dump photo tips and concentrate on camera reviews; it does mean that cost-per-click contextual ads may not be the best way to monetize such content. "Behavioral" display ads or sponsorships might work better, for example. (Of course, if you've got enough traffic, high click volume can make up for low cost per click.)