Interesting. It seems this may be one of Mozilla's first(?) forays into a potentially paid service: hosted TowTruck accounts.

Since it runs on a central server, that server will either be Mozilla's or yours. I know I don't want to deal with that hassle -- I'd much rather pay someone else to run the service -- and I can't imagine Mozilla's going to do it for free at scale.

Mozilla hasn't yet pulled a Reader, as far as I know, but I would be worried about their dedication to a hosted service like this.