Bing is reported mixing in paid search ads within its organic results, reports the RKGBlog blog who have posted a screenshot (see below) showing the Bing testing of search ads directly in the organic results.
Here's the blown up screenshot:
Microsoft has confirmed this is a test they are running. A Microsoft spokesperson said:
We're constantly testing and experimenting on Bing, and with that, we carefully measure user engagement and reaction to these changes. We have nothing further to share at this time.