Are we allowed to remove AdSense advertisement and replace it with another or one from a different ad network once the original ad is loaded and, say, 10 seconds have passed? This is exactly what Grooveshark is doing, and I was wondering if this is OK.
Another question: Does an AdSense ad (say an animated display ad) refresh itself automatically, and if so, does that count as a new impression?
EDIT: On Grooveshark, every click somewhere on the page generates a new ad impression.