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Fair point. To nostrplebs.com credit, they do seem to lay it out as is ...
'It's a human readable identifier for your public key. It makes finding your profile on Nostr easier. It makes identifying your account easier. A NIP-05 ID also provides you with a shiny verified checkmark!'
.. which is why I sent them a few sats. It's not that I thought I'm verifying who I am. After all, who am I but a pleb. I just wanted to make it human-readable. I figure if I was on bird app and there's a blue-check by @real_important_person handle, it doesn't mean that the tweet I'm reading, or the pm I'm sending will be wrote or read by said important person. Did someone hack into the account?
I guess, in the world of nyms, 'verification' is a process not a transaction. Someone who just generated an nsec, and searched a nym might find a few human-readable matches, if you have listened to that person or interacted with that person, it should be pretty easy to verify with a degree of certainty.