I have exactly one page that shows PSA since about 2 days ago (it has been fine all along). Emailed support and apparently there's a problem with ad targeting and they're trying to fix it. Does anyone else face this problem? Have you checked all your pages lately?
Maybe that's what the problem is. I've had the same ads for 2 days that don't match my content at all. The ads don't change so I filtered 'em.