CherryHintonBlue - 2:34 pm on Jun 27, 2003 (gmt 0)
AdSense terms state that
You can only place one set of ads (one copy of the AdSense HTML ad code) on each page. Otherwise, ads may be double-served. In an effort to maintain the quality of our program, Google does not support double-serving. Please select the one ad placement best suited for each of your pages.
My sites have thousands of pages of content which often stretch to two, three or more screens vertically. I proved to my own satisfaction long ago that I'd get more clickthroughs for my advertisers if their horizontal banner at the top of the page was repeated at the bottom: whilst clickthroughs weren't doubled, they were certainly up by at least 50%.
I appreciate Google can't allow webmasters to serve up hundreds of AdSense ads on a page, but surely the ability to repeat a horizontal ad "below the fold" would be to everyone's benefit?