I have a site: www.knightarcade.com that I had a pretty low price (around .03 CPC) and then I added arcade banner exchange programs to the site and a few days later (the big update) my cost shot up. Does anyone have an idea if this would be bringing my site's quality score down? I was reading that affiliate links can affect your quality score quite a bit. Do you consider these affiliate links / what do you think I should do?