I believe what John was trying to say earlier is that Inertia Networks submitted its domain name (inertianetworks.com) to be put on the "Preloaded HSTS List", meaning that the browsers that support this feature will know to connect to the subdomains and the domain (inertianetworks.com) itself using ONLY SSL or die trying.
The enforcing in the browser directly happens in Chromium, Chrome, Safari (Mavericks OS X 10.9), Firefox 26 (that I know of) and Opera. If you're thinking I missed Internet Explore, I did not, because not a single version of IE (including the ones in Windows 8) does not enforce the list. The same may be for the browsers on iOS & Android.