Re:What is legally happening here? (Score 2, Informative)

You're correct about the Right of First Sale. It's enumerated in 17 USC 109:

Notwithstanding the provisions of section 106(3), the owner of a particular copy or phonorecord lawfully made under this title, or any person authorized by such owner, is entitled, without the authority of the copyright owner, to sell or otherwise dispose of the possession of that copy or phonorecord.

However...you're incorrect here:

The courts have ruled that mere possession of the physical medium does not imply license to use, as does the possession of a book or musical recording, because to make use of the digital data it must be copied into memory first and that copying is covered under copyright law as restricted. Thus you need a license to copy that which you have already purchased for use.

17USC117(a)(1) specifically exempts copies made as a necessary part of using it:

Notwithstanding the provisions of section 106, it is not an infringement for the owner of a copy of a computer program to make or authorize the making of another copy or adaptation of that computer program provided that such a new copy or adaptation is created as an essential step in the utilization of the computer program in conjunction with a machine and that it is used in no other manner