I'm happy to see this and might give it a try as I've often wanted RSS + recommendations. I like being tipped off to things I wouldn't have found on my own and like RSS as a standard protocol.

I've often wondered if it could all be done in some kind of decentralized way though, just to avoid a central server for the recommendations.

I'm not sure my interest in the decentralized part comes from a privacy concern per se, it's more of a pure interest, "would this work" thing, maybe with a bit of robustness interest too.