It was an old interface that wasn't as good as modern self-checkouts at grocery stores. Predated them, though, automating the whole process. You drive up to a fuel pump looking thing, tell it what you want, pay it, the equipment gets the right stuff, and it brings it to you somehow. The only people necessary are those that stock it. Probably just one or two doing a full shift on busy days with a part time one on slower ones. Pretty amazing given big companies were bragging about rolling out self-checkouts that just automated a register when he had people automated a whole store many years before.

Note: Guy's name is Michael Rivalto. He's a VC that my brothers told me. Family friend that used to occasionally take them to school in his supercars. Lasting impression there haha.