Yeah, but also if they had withdrawn the $1 note from circulation, vending machines would have been forced to adapt. Businesses too. But businesses can go along with it. Remember with the Sacagawea dollars, the mint went out and even partnered with Walmart to distribute the coins. But the Bureau of Engraving and Printing refused to go along with it and wouldn't withdraw the $1 note, so it that partnership with Walmart went to waste.