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"In the first quarter of 2008, Click Forensics announced that click fraud has decreased across Google and Yahoo to 27.8% (from 28.3% in Q4 2007).  Is that a number to be worried about?  As Barry says o"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/016979.html>