He has also been active in the Cashu group for a good while.
I'd apologise then help him do something good with it, or negotiate a price.
You can't expect all cashu domains to be gifted to you, and public shaming/witch hunting doesn't help your cause.
nostr:nprofile1qqsdulkdrc5hdf4dktl6taxmsxnasykghdnf32sqmnc7w6km2hhav3gpzpmhxue69uhkummnw3ezumt0d5hsz9thwden5te0wfjkccte9ehx7um5wghxyee0qyqq78r794 is a good dude, and I'm sure will use it for good one day.
Offer some money for it.
"give me this"... "no"... "okay, I will shame you", isn't the way.
Discussion
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