Oh Lord you need to take on some non-tech companies as clients if this surprises you. I've had clients who forgot they had a website and thought that monthly hosting bill was just for something to do with the back-office Internet connection.
It was a janitorial temp company and they didn't really care about computers. Whoever had been their IT guy before me had made a pretty neat website that would let clients book cleaning staff and give them a birds-eye- view of upcoming staffing needs. It was marginally better than their existing phone and email based system but not enough to make them change it, and over years of saying "let's try it next quarter" eventually everybody forgot about it.
