Yelp has also done this. It's very (or rather, isn't very) noticeable on mobile, where it takes some attention to see if you are in algorithmic or sponsored res

Yelp has also done this. It's very (or rather, isn't very) noticeable on mobile, where it takes some attention to see if you are in algorithmic or sponsored results. Looks like Overture/Goto.com was a bit too early, and a bit not-monopoly-enough.