Unlike a disc, you can't use the code without going through the PlayStation Store. And you likely cannot resell it, either.
You can't buy a non-Sony PlayStation, I guess they'll argue it's similar.
You can't buy a non-Sony PlayStation, I guess they'll argue it's similar.
The NES and SNES for example had their famous lockout chips which gave Nintendo a monopoly on releasing games, except for the Activision/EA thing were they reversed engineered the chips.