You know, I am entirely over the snotty responses to my assertions, that will never change, that it is ultimately up to Microsoft (or whatever licensing entity) to enforce their own licensing rules programatically. It's not anywhere near to impossible to do.
And
@River Valley Computer, don't let the central point fly over your head any faster than it did. I'll repeat again: There are those who argue that using the in-place upgrade method from Windows 7/8/8.1 to Windows 10, after the date that Microsoft said the "offer was closed," are committing a licensing violation. I want to see you give a coherent argument why that would be true, as I don't think one can be made. So long as I present a Windows 7/8/8.1 system to Microsoft, using either the ISO, external media, or the Update Assistant on the Windows 10 update page, and they allow the process to go through, it's legal. It is not up to me to figure out whether it is legal or not in that situation, which I clearly separated out from direct violation of EULA by supplying another machine's license key to activate on any machine other than the one on which the original Windows 7/8/8.1 license had been activated (unless it was a retail license, and let's not get into all those details).
It is not, and never will be, up to me as a technician to do anything other than use a method prescribed by Microsoft to present a Windows 7/8/8.1 to them for a free upgrade. So long as they upgrade it, my due diligence is well and truly done, as they can "flip a switch" and stop this tomorrow if they so choose. I am not going to try to re-read the pages and pages of stuff presented when you get to the screen and have a checkbox for, "I've read and agree to the terms," each and every time I run an in-place upgrade. No reasonable person would ever do so, either. If they've stuck something in there, somewhere, to the effect that this method is no longer legal after July 31, 2016, but still let it run through to completion, that's on them, not me. And I'd be willing to bet a substantial sum of money that such has never been added, since all they'd have to do to stop this is "flip that switch."