every site has a sweet spot of adsense ad acreage. I reached mine years ago and every effort I've made to increase it due to google suggestions has led to a fall in revenue. They must know this. Also, if I make my main text box text/image, revenue falls but google insists on repeatedly inviting, sorry insisting, that I make it image-enabled.
and we already know the adsense and search teams have lunch in different canteens. If adding this monstrosity gets you Pandalised, you can't go crying to google.
personally, I won't be touching this with a bargepole. It looks hideous.