When a search for movies brings up the same Harry Potter fan site 3 times in the first two pages and on page 3 says "No Results Found" I don't think they have the algorithms in place to do much of any sophistication, let alone penalize adsense purchasers.

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I liken SEO to voodoo and make a sacrifice of rum and decapitate a chicken to Papa Legba, spirit of communications and crossroads, before every site launch.