This is meant to be a service to passengers
No it's a money making enterprise offering a service to passengers. The free markets offers a Hell of a lot more options that an iPhone and a quick search would show. Anything on site at the airport is there to restrict my options to their own higher priced partial-monopoly. I mean look at WHSmith for God's sake, a Dick Turpin enterprise by any other name. The trick is to work round them where you can!