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On Thursday, a number of popular sites and blogs found their Google page ranks fall by a number of places. The charge: buying and selling links.

Washingtonpost.com, Techcrunch, Engadget, and Forbes were among the list of victims, according to Forbes.

Earlier this month, Google announced plans to enforce its ban on paid links and this step may help scare off potential offenders.

Google claims that paid links bias search results, while critics claim that enforcing the rule forces sites to pump more money into AdSense.

source: iMedia Connection: Google strikes Forbes, others in paid links war