This is actually an important point if you use AdSense. Anyone who actually sees the ads on this site knows that the poll of possible ads you see is pretty small. This is largely because the front page of UGN Security is fairly static. I personaly, out of curiosity, have visited links that Google Adsense displays on the front page. However, a new advertisment rarely comes up, giving me little cause to click.

Take this into consideration when using Adsense on your site. Use Adsense on various pages with different types of content(like UGN Security does), or be sure to keep the content new and interesting so that the user sees different Ads each time they visit.

NOTE: I know this is a bit old, but it's still pretty high on the first page, so I call it fair game.