The proliferation of MFA websites and blogs that contain no value added content and with the increase of AdSense arbitragers, the waters have finally become murky enough for Google to do something about it. A wise decision considering that these websites simply do not help their bottom line, although they still make money out of the deal. If an advertiser does not receive a good return on her investment, she will stop using the service and that may be the case already. If you run a number of MFA websites or blogs, you may want to cut it out before you receive a pink slip from Google.