There are several differences between the two:

- Vending machines don't stop displaying what they sell to show ads

- Vending machines that were not designed by monsters show you things that are not in stock anymore, this thing does

- Vending machines often aim at impulse buying in locations where you don't really have alternative. Here, we're talking about actual stores, to which people often go several times a week. That, at least to me, make it twice as frustrating when it does not work as show in the tweets.