I was reading SEOChat’s How Your Search Data Can Make You Look Like a Star (as opposed to, say, a parallelogram) when I noticed something interesting. There are a number of links that have heavy underlining — heavier lines than for your average link. Hovering over the link with the mouse causes a “sponsor” pop-up to show, like a tooltip:
I don’t have time to dig into the technology that underlies this, nor what the analytics and privacy issues are, but it looks consumer-friendly, and provides ample opportunity for advertisers. Talk about in-product placement.