So you're saying that we should either be willing to pay $5/m for an RSS reader service, or $5/m to host the service ourselves?
Someone with a lot of feeds wouldn't be able to fit all of them in the 5 MB that DOM Storage allows. I wouldn't like an offline feed since a big majority of my feeds are videos and podcasts.
As for them being able to yank away at any time, you're right, but there's going to be enough new stuff out there that it wont be a problem, this time we wont have a monopoly.