@scottalanmiller https://support.microsoft.com/en-us/help/12435/windows-10-upgrade-faq

Just because you can does not mean you are allowed. From MS own page

Do I still qualify for the free upgrade offer if I've already downloaded Windows 10 to a USB drive, but haven't yet upgraded my device?
All upgrades must have completed and reached the "Welcome" screen by 11:59 PM UTC-10 (Hawaii) on July 29, 2016; this is one worldwide point in time