rich1.0npub1k028vrf3fvrgfwzcz8gaut5jmk8urxldl84uxwzcmmxugsq43y4su93hmshttps://nostr.ae/npub1k028vrf3fvrgfwzcz8gaut5jmk8urxldl84uxwzcmmxugsq43y4su93hmsnjumphttps://nostr.aeWhat does dual extract mean, and why does it matter?