nostr:npub1rgyrrn6mmvzvj3zp3ufue3xn3kwxrcjzzf439eyphps97p5wxfrschfpgz nostr:npub1m4pgcentxstypfd44hy9z5ukv3vs9cxuzcm9rup386ppvfmkjkdsmhyvy8 Are you familiar with nostr? That's what he's posting on and yes there is some flavor of relay between that and ActivityPub but in broad terms they are both federated networks.