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		 Any of the 2nd and 3rd tier PPC engines are riddled with bad traffic and click fraud.  They don't have the traffic that others have, so they have to take on some very shady partners. 
 
But still, with PPC, you can't just look at it as finding the fraud.  You have to look at it from an ROI perspective.  If you are paying $1.00 on Yahoo and $0.10 on MIVA, and the MIVA traffic is 80% shit, you're still not getting a bad deal out of it.  Test it out and see what your ROI is. 
		
	
		
		
		
		
		
	
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