What's worse than having pop-up ads on your website? Having ads on your website that aren't actually contextual and aren't properly matching the text of your website to draw in prospects. (Well, maybe it's not worse, but it's surely frustrating a lot of publishers.) At WebmasterWorld, incrediBILL says that "[t]here were ads for all sorts of junk linking to sites that didn't have what it claimed, Amazon affiliates, off topic garbage, even phone company directory listings." He started trying to weed out the bad ads by hand, but says that his filter list is already full, so it wasn't easy to do.
Bill is not alone. It seems that a lot of other publishers are starting to filter out up to 90% of new ads that are using the Google AdSense program. Publishers complain that "[a]pparently the targeted ads aren't quality/relevance checked at all by Google," which doesn't make the viability of AdSense a strong one at this time.
Is there a correlation to a holiday weekend? Some forum members suggest that to be the case. One member says that "[l]ow advertiser inventory lowers the threshold to the bottom feeders." But others contest this claim, saying that bottom feeders should cease to exist if Google is really screening them for quality. This is a valid point.
Forum discussion continues at WebmasterWorld.