No. No-one knows about it. I developed it a few years ago (before Nostr existed) when I designed a network that is pretty similar to Nostr. I realized that for content to properly propagate while remaining true p2p and work even in ultra hostile environments (such local adhoc meshnetworks that were being attacked (think demonstrations etc)) content needed to be filtered. When Nostr broke through and reached escape velocity, I quit working on it.