Why Nostr? What is Njump?

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Public Key
npub16u0rz0stlt7867cr23t7pfhqvr4ldp25f5aua2hkplkuyatwgmfs6x9lpl
Profile Code
nprofile1qqsdw8338c9l4lra0vp4g4lq5msxp6lks42y6w7w4tmqlmwzw4hyd5cgpvp40
Author Public Key
npub16u0rz0stlt7867cr23t7pfhqvr4ldp25f5aua2hkplkuyatwgmfs6x9lpl