We're the only community I've seen that has an additional navigation bar at the top which contains nothing but links to an off-site company/organization website. 

Does Canonical pay Stack Exchange to run this site? Are Canonical employees part of the moderation team and/or helping to run the site?

Here's the nav-bar I'm referring to:

<img src="https://s14.postimg.cc/ss6uiw10h/canonical_nav_bar.png"/>