What's the use case for something like this ? Looks a bit like what any RSS reader would provide. Or maybe it's meant to publish links to other blogs on a separate site, which could work if the articles have a somewhat permissive license, I guess.
It allows bloggers that want to keep control over their own platform and content (read: not use Medium) to be part of a bigger network of selfhosted blogs. Like in the good old days. I for one hope it catches on
Most centralized platforms seem to recommend other authors based entirely on the topic. You’re reading a post about Rails Generators? It’ll recommend other articles about the same thing. With WebRings it was way more diverse than that. End up on an electronics page and discover all sorts of other fascinating authors doing entirely different things.