Is that appropriate though? Just because it is done that way doesn't mean it should be. It's not that uncommon for people to pay their internet in advance, only for a line outage to go unfixed for a fortnight.
Patticularly in the US, internet access is a cage. There's often only one provider, and their terms and conditons declare service not guarenteed. What choice do you have?
Then google fibre and municipal wifi start showing up, and look how hard comcast et al are screaming.
Maybe your rent, cable and phone need escape hatches as badly as your movie collection?
I don't know. On the one hand, I don't like pre-paying for electricity considering the potentially huge fluctuations in use. On the other hand, I don't use gas and then pay for it. I eat at a restaurant first, then pay, but I buy groceries before I eat.
So I don't know. I can see phone as being a purchase of a block of X to use. The same with rent. Almost all internet comes with an uptime guarantee - say it's 99.9%, if it's down for more than 45 minutes, even Comcast will provide a credit.
I suppose it comes down to how you agree to consume it. I don't mind the 24 hour model on video rentals, when I can start that 24 hours any time within 30 days. I'm purchasing the right to watch the movie as many times as I want in a 24 hour window sometime in the next month. That said, I also believe that if I purchase unlimited video in the form of a DVD or download, I have the right to device-shift it wherever the heck I want.