I think there is more to it than affiliate links etc. I have one website targetted at UK users and those keywords haven't been touched (yet?) whilst my websites targetted at the US are all slapped (identical websites with just slight differences such as quoted numbers in £ not $ etc. on different URL's).
All my sites carry adsense, plus many pages of content, contact us page, site map, privacy statement, Clickbank hoplinks, Maxbounty, NeverblueAds links etc. so you explain it to me please?