While that site is cool, it's far from convenient to have food shipped. I'm not going to order my groceries and wait 3-5 business days to be able to eat.
You can't order it with gold either, so gold is failure too, right?
Well gold has certainly failed, at least as a form of currency. Nowhere is going to accept your gold instead of money. Gold also is no longer the standard for currency; now currencies are backed by assets and the state of the economy.