Less links equals higher click through ratio
When a person visits any page on your site they scan it very quickly to see if it contains what they’re looking for. All of that takes place in a matter of seconds. They usually scan in an F pattern, so that’s where you’d want to place your ads. One trick to helping your click through ratio is to offer fewer links to the user.
When they look at the page more often than not they’ll decide that they don’t think your page contains what they’re looking for. After that decision is made they’ll either exit your page through the back button or a link that is on the page. If there are a lot of links to choose from (including your ads) there’s a much smaller chance that they’ll exit the page through the ad. So to increase the probability of them clicking an ad is to only provide ad links in that F pattern and put the other links you want to have on your page in another location.