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> except for the fairly major problem that links and clicks can be automated, turning that into a bidding war.

I mean no disrespect by this but I'm inclined to think Google knows more about the issue of link and click fraud than you do.

Oh indeed, and I didn’t mean to imply otherwise. Most of what I know about it comes from their engineers explaining how they fight it — and that includes my awareness of how catastrophic it would be if they did nothing and only used the original PageRank algorithm without compensating for it.

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