If those 20 fraud clicks didn’t come from a source similar to 2000-20000 pageviews, they should be able to pick out something happening. Like. You’re right: it

If those 20 fraud clicks didn’t come from a source similar to 2000-20000 pageviews, they should be able to pick out something happening. Like. You’re right: it’s easier for a small-time fraudster to do cpc fraud, but they should still be able detect suspicious page views, whether there’s a click involved or not. At cpc large scale fraud, there’s a lot of data either way.