Google has deep pockets and probably would be happy if Facebook, eBay and Craigslist were part of its empire ... but last I checked, they're all separate companies.
Nonetheless, links to those three sites are showing as Deep Links on Bing under the Google.com result when you search for [google].
The "Go to YouTube" link can at least be explained by the fact that Google owns YouTube; the others are clearly a bug, and one that I can't easily explain. That exact text -- "Go to Facebook," etc. -- doesn't show up anywhere on the page or in the source code when you do navigational searches [...]
Related Topics: Channel: SEO | Microsoft: Bing | Microsoft: Bing Deep Links