The first Chromebook was advertised the same way in the Canary builds. The one that shipped to my zip code did not end up at my house. :)

The ad doesn't show up during apps - at least not that I ever saw, but, only on the app selection page or bookmark page.

It has been used very sparingly and I'm not sure I've seen it more than a handful of times since switching to Canary as my primary browser ages ago.