It will only be tied to the device holding the old license. A key part of this process is that it will save a product key tied to the previously upgraded PC or device in Windows Store. This is how Windows 10 will later know that the install is allowed: It’s “one of the benefits of the new delivery system,” a Microsoft representative has told me.
A Microsoft representative told "you" this or did they tell a guy named Paul Thurrott and you just forgot the link?
Here's the whole quote and link:
But what if you want to do a “real” clean install?
Microsoft tells me that it will be possible to do so. And that a key part of this process is that it will save a product key tied to the previously upgraded PC or device in Windows Store. This is how Windows 10 will later know that the install is allowed: It’s “one of the benefits of the new delivery system,” a Microsoft representative told me.
https://www.thurrott.com/windows/windows-10/3898/a-few-more-answers-about-windows-10-upgrades
What about all the other information you copied and pasted here? Did you just forget the links to that as well? A slight oversight? trying to pass things off as your own? hmm?