At Gen Con they had a keyforge vending machine (I have an image for a similar machine below). All you could buy was sealed decks. I don't know how well it actually did, but I definitely had some friends who bought decks purely for the novelty of getting them out of a vending machine. I was think it would have been even more exciting for me if they had opened decks in the machine, but all you could see was the archon (and the houses).