All I’m looking for in digital media is convenience and a fair price, in that order. Convenience means that I can get what I want, right now (bandwidth permitting), and play it on the device of my choice. A fair price is an amount that I’d consider loose change rather than something I need to budget for.
Imagine you’re running a train company. You have a timetable for seven days a week. Your staff aren’t required to work on Sundays, but can volunteer to do so. Indeed, you need some of them to volunteer in order to run a service, so you sweeten the offer by paying them double for voluntary Sunday work.