Do you find adverts work better with or without borders? Up until a while a go I always thought no borders were the way to go but the more I play about with it the more I seem to find borders are increasing CTR.
I tried running borders for two weeks, I get about double the amount of clicks without borders. But I suppose it depends on niche of your site and the type of visitors.
Borders are said to produce less clicks and seems to be the case. Can't really say why however I don't argue. I only have one rt which is with a border and is seen every 10 PageViews.
I think borders reduce clicks, first time when I add adsense to my site whith borders i had low earnings.
I always put border up until a few days ago, and then tried with no borders and my CTR has been higher.