http://techcrunch.com/2012/02/06/tsavo-media-to-pay-yahoo-4-8m-for-sending-low-quality-traffic-president-quits/ http://techcrunch.com/2012/02/06/tsavo-media-to-

http://techcrunch.com/2012/02/06/tsavo-media-to-pay-yahoo-4-8m-for-sending-low-quality-traffic-president-quits/ http://techcrunch.com/2012/02/06/tsavo-media-to-pay-yahoo-4-... They send bot traffic and mix in PPC traffic to make it look "legit". when too many advertisers complain, this is the result.