I never knew they exist but when I was on a bicycle tour with my father several years ago we found one of these vending machines that sell bicycle tubes for cash. It is a very funny Idea and when you have a problem with your bicycle tube and the shops are already closed in the evening or on weekends this is the only possible way to get one.
Now during the Covid-Pandemic where a lot of these shops aren't allowed to stay open this is also a possibility to sell bicycle tubes :-) or maybe even other bicycle equipment with different kinds of vending machines.
Me in front of a "Schlauchomat". Picture: Gottfried Glechner.