Google has begun to send Email to the "pure advertising" web site publisher, ordered it to stop using existing advertising model. ;
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these "pure" advertising website, by buying cheaper keywords in the Adword, and on the page display more expensive keyword advertising to earn the difference, this advertising station once very popular in foreign countries, but for Google Adsense is not only in the "internal price" loss.
Google said in a warning letter, such advertisers account will be banned in June 1st – to advertisers enough time to adjust their website model.