I agree with Brett. The quality score factor is completely overboard. I understand for relevancy purposes, why they have a score. But the extent to which the score dictates whether you can even advertise on their system or not, is completely over the top. I know legitimate businesses who have gotten slapped on Adwords, just because their algorithm doesn't like the site (for some reason). Those same businesses can advertise anywhere and everywhere else they want, with no issues whatsoever. At some point, doesn't Google understand people pay to advertise, so let them?