birchy - 1:58 pm on Jul 7, 2013 (gmt 0)
The CTR dropped with the borders. I guess there are more morons than I thought.
It sounds like your experience is very similar to mine. I added extra space and made the background colors stand out from the page. I went from 100x CTR to almost zero, made the changes and clawed back up to 5x CTR. My ads are in the center, breaking up a long, tall table. There may be more morons than we think, but they *couldn't* have made up 90% of previous clicks. But how else do I explain the huge reduction in clawbacks right after adding space?
I think I'll return the ads to the way there were before, and see if the clawbacks return. If they don't, then I can blame it all on Google.