It sounds simple on the surface. You copy a link on a site into a feed reader app. Then whenever that site updates you get a nice readable article on the app.
But that sounds like something that could be accomplished locally. Why does every RSS reader I run into require an account or otherwise rely on the cloud?
I used to use RSS to get a Craigslist search feed so new listings I searched for would just pop up next to my email in Thunderbird. it was nice