For the committed RSS fan who also enjoys nostr, you can now get posts from npubs you like in a RSS feed.

It seems fairly straightforward. Looks like is a paid service where you can subscribe to an npub (or npubs) and they'll search relays for content from the npub and dump it into an RSS feed for you.

Useful? I don't know that I'd end up using it, but I'm also not big on RSS.