Now, that's interesting. I have noticed something weird about Adsense on my sites. I have Adsense on 20+ sites and up until recently was earning a reasonable sum every month.

Suddenly, although I am still getting the same number of Page impressions, the click through rate has dropped on most days to zero.

I am still putting the same level of content on the sites.

But I wonder if a problem might have occurred at Google's end? People could well be clicking on adverts and these, for some reason, or not showing up for either advertiser or publisher?

Fraud or C-up, I wonder?

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