Not just copyright, normal law works like this too.

E.G. if you're a company, you can rent a printer and pay per page. THe printer is physically in your own office, it's for your own exclusive use, but you can still get a per-page contract if you wish.

That's property law for you, earning money from other people's work just because you have a piece of paper claiming ownership over the land they work on is all about rent seeking.