They're opening themselves up to counterfeiting. The U.S. currency has the largest R&D budget in the world to make sure all its notes in circulation are the real deal. They wont have anything even remotely close to it.
I'll take whatever i can get that actually spends in useful places (like the internet). Let me know when amazon takes gold (or seashells for that matter).
I'll take it, sure. I love this. But I get the feeling someone from USG is going to be visiting them soon and giving them a hard time.