@Kristian / z428
RSS is a quagmire, both legally and in terms of specification. Really, it's a bloody mess and I don't think it can be resolved. Use Atom. You can call this RSS if you want (many people do), but ATOM is a proven standard specification without all the individual personality cults and technical issues and legal issues involved.
Companies stopped providing RSS/ATOM feeds about ten years ago because viewing content on remote sites did not bring people back to your site for targeted advertising. This is why all the major providers stopped supporting it.
My own projects consume 3 different flavours of RSS (and Atom and ActivityStreams) but only emit ATOM and ActivityStreams. I'm hoping this year we can finally drop RSS <= 1.0, but 2.0 is a much larger mess and it really has to go. Let it die, please. Use Atom.