I have goodyear tire ads showing across a bunch of sites today, all sites with arrows. All sites have nothing to do with automotive in the least and I have not visited any automotive/tire sites on my computer and no one else uses it. CTR is in the toilet beyond belief and therefore my earnings. (Just now blocked them)
Thanks AdSense algo! You're really working well to optimize the ads on my sites! Thanks for teaching us in your blog posts and in person at AdSense in Your City never to use the block url function because your algo does such a great job optimizing revenue for our sites. I totally believe you.
PS: Lets see if I still have arrows next month after this great targeting!