The best anti-sopa ad I've seen this morning (12h ago) when following a link to Forbes and there was an overlay ad covering the whole browser window in dark gray (marked as Advertisement in the title but no further text, only gray) - either Forbes did this themselves or somebody is spending some money to get the message around to Average Joe.
> Average Joe
???
I read TC every day and it took me a little bit before I realized that the huge banner ad at the top and the one on the right were a) there and b) anti-SOPA.
Also, a very possible explanation could be that they're only showing those ads by targeting pages that show SOPA content. The display network is HUGE and it would be a big ticket purchase for Google to buy-out the entire network themselves (they still have to pay the sites). Are there any examples of this showing up on non-tech, non-sopa related sites? If so, please include them. If not, you're probably just seeing Google buy targeted ads around a subject (SOPA) and paying for them on their own network. Not unheard of, as they've done similar things with Chrome, etc
Edit: I do see the ads on www.Wired.com though.