What is the story with sites like the following (all the same format): 54renti.com 19ooo.us 19yyy.us hkmedia.com Obviously Google loves them as these sites bring in the clicks and the sites themselves make money. I went through a friends campaign and these sites have cost her quite a few bob with zero increase in business. I have now excluded most of these and am now moving her Network to managed, without the likes of the above. Why does Google tolerate them - apart from the billions! Have they any use what so ever? Thanks.