I thought the common knowledge on why the "workstation" cards were more expensive than the gaming cards was that you're paying for the driver development for the pro cards (extra stability testing, CAD software compatibility or whatever). What this guy is doing here is just changing what driver the card tells the computer to use.

So really, this is equivalent to software piracy/unlocking software with a product key. He's not changing the actual capabilities of the hardware, just what driver software it unlocks.