Yeah, because these machines are all free to the business owners, amirite?
Not free, but in the end they will pay for itself. You could have say 2 counter staff and 2 drive through staff. @10 / hour x 30 hours a week. $1,200 not counting all cost and risk when having employees.
It's already being used by jack in the box https://www.youtube.com/watch?v=mfKbaX4jE9U