It should be digitally licensed. So installing a fresh copy will automatically activate.
That being said, you should also be able to search for "Reset this PC" in your start menu and choose "Remove everything". That will effectively give you a fresh install without creating installation media.
That ship just sailed.
What are the coverage dates for the three Windows 7 ESU SKUs?
They've now added that "non-commercial" qualifier to accessibility apps and mod tools. So they're totally cool with 3rd parties adding value to their platform. As long as all of the revenue resulting from that unpaid work goes straight to Reddit.
They announced the M.2 HAT in the linked article...