Danny Sullivan highlighted that Google is growing careless about publishers clicking their own ads:
Accidents happen from the Google Inside AdSense blog today caught my eye. Apparently, lots of publishers accidentally click on their ads and write in to Google to say sorry. Don't worry, says Google, "chances are we've already detected your clicks on your ads and discounted them." Bull.
Seriously, bull. Here's an example. Over on my personal blog Daggle, I have AdSense ads. If I accidentally click on one of those ads, how does Google know that it was me the blog owner that did that and thus automatically issues a credit?
Maybe they are trying to offset for the recent MFA purge.