If I ran a business where demand for a particular service had dropped two thirds in a decade (and 21% in a year) and where only 2% of the target market (children travelling) used the service, I might be tempted to drop it.
Actually, I wouldn't just be tempted. I'd do it, and re-deploy the people and money expended into an area that might (a) grow new business or (b) support other higher fare paying passengers.
Obviously, this is not a view shared by some posters on this thread but at least it's based on the actual facts of the situation...