Thank you for posting that very important link.
But, I would ask you about case such as that of roboniel.
As roboniel says
I've bought a Licence of PSE 12 via Ebay, for both PSE 12 and Premiere Elements 12.
and no installation disc. And, no mention of installation files. Does that not signal potential problems for roboniel moving forward
as it relates to the Adobe Licensing Agreement?
Might not it be a good idea for roboniel to pursue the matter with the Ebay seller.