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I thought this is what is called click arbitrage. Would Google have two standards for publishers and themselves? Any thoughts?
The landing image search page was having lots of Adsense ads of high paying keywords.
I think you meant "AdWords ads."
Also, as netmeg points out, an ad that refers the user to another page within the same site or group of properties (e.g., from Google Web Search results to Google Image Search results) isn't arbitrage: it's a "house ad."