A person close to me saves in a Bitcoin and cash mix. Pointed them to nostr:npub1xkere5pd94672h8w8r77uf4ustcazhfujkqgqzcykrdzakm4zl4qeud0en after the recent release of BTC and savings account features. Had them use referral code/link. They signed up.

What causes a US citizen with a normal financial situation to face a nostr:npub1xkere5pd94672h8w8r77uf4ustcazhfujkqgqzcykrdzakm4zl4qeud0en account rejection like this?