londrum - 2:44 pm on May 8, 2010 (gmt 0)
i reckon interest-based should replace public service ads. if they haven't got an ad to show that's on target and relevant, then by all means show an interest-based one instead. but having them outrank the on-target ones is stupid.
i don't care if they potentially pay more money. if no one is clicking them, then what's the point.