I have seen a drop in CTR over the last few days on my proxy site. http://www.unblockaroo.com I think this may partly be due to my users becoming ad blind, but there also must be some other underlying problem with my ad placement. What can I do to improve my CTR?
IF this happens, you'll need to change your placement from time to time for repeat visitors: Change one of your units to an image only unit and change the ad link colors.. to a sky blue. Also: play around w/ different ad sizes
maybe mix it up with a lighter blue or black... if youre worried about ad blindness just keep changing up the colors and/or placement. maybe a banner instead of a block?