Inq7.net sells text links at Php50k a pop.

The ads appear on the bottom righthand side of the page. Low visibility.

Zero PR juice, too, since the links pass through adbrite and don’t point directly to your URL. Perhaps Adbrite wants to track the stats?

The Adbrite INQ7 page (link in above post) shows an average total clicks of “less than 1”.

It would be interesting to actually test it, though. :-)