That’s a Mastodon account.
Discussion
mastodon accounts can sign nostr notes?
No, it's coming across the relay.mostr.pub mastodon bridge.
They can put a lightning address in their profile now and it will come across the mostr bridge.
Since when, and how will they know to do it? nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6
Have you seen anyone use it yet outside of bitcoiners testing?
try zapping my mastod account nostr:npub19w4hggunr8s5wzxlddwdgf8dtaj8u6ye4ux6xnqcgm2hqdylc3zqtqcyz9
it worked