I notice site with high PR sites seem have high CPC ads while low PR site, the ads seems have many MFA ads or yellowpage ads.. Does Google have this algorithm so that low PR/authority sites won't show high CPC ads, or even it is showed the CPC is low? I would guess it is a mechnism to prevent spam. As you see, some premium publishers like ezinearticles has its own Google Ads format, which blends even better
it will also depends on where the website visitor is from, some ads in U.S will not be displayed in U.K, so it depends on the adsense bot.
It's seems an interesting idea but I guess it is more based on the content rather than the PR but things might change in future.
No. I can attest not. TRAFFIC does influence it though. I've run multiple high traffic sites, and after the first traffic surges, the ads seem to improve. After the first few days of getting 10k uniques the ads seem to infinitely improve. I'd say it's more traffic related than pagerank related, but high pagerank sites do tend to get more traffic. On the other hand, I've also had low traffic, low pagerank blogs and things that have earned $2/click, etc.
Cyrus255, I am confused, so you mean 1. High traffic sites get high CPC ads, until maximum? 2. Your low traffic site gets high CPC ads, and still increasing CPC, or flat? I am trying to figuring out Google strategy in this. As I will think Google won't put, say $10 ads for a credit card site unless proves worth it, right?