Normal subject of peel back ads
For one, when the ad creative is done well I have seen peel back ads produce strong click rates. Something else I feel only recently is that, peel backs are less intrusive than other 'high-impact' interactive ad types. While push downs and expandable ads at corner of web page create unexpected effects on the page, the behavior this code is standard and predictable. Because of it's placement at the top of the page, the peel back effect is unlikely to interfere with the main content of site area the way push downs and expandables often do. But it can interfere with search, navigation, and other header elements.