While this looks like click fraud to the advertisers, is that failure due to the people clicking? Or Google? This seems to be to be a failure on Google's part

While this looks like click fraud to the advertisers, is that failure due to the people clicking? Or Google? This seems to be to be a failure on Google's part to properly leverage a real audience, rather than a legitimate detection of click fraud. Google's Ad system is assuming a transient audience with little invested in the content, so that sending the same (content targeted) ad repeatedly to the site is the right thing. This is a small audience with much invested in the site. Sending ads from the same advertiser to the same small audience has diminishing returns. This is a failure to capture value, based on the investment of the audience rather than the type of the content. Sending a wide variety of ads is necessary to properly leverage a small invested audience.