The very fact that you say so basically proves the parent's point: you believe that you bought a game (or a Kindle ebook or whatever), whereas in fact you have

The very fact that you say so basically proves the parent's point: you believe that you bought a game (or a Kindle ebook or whatever), whereas in fact you have zero control over it and if the vendor decides you can't use it, you can't. It's not a theory, it's practical reality, already tested by Adobe.