nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8 is right about nostr:npub1tkey6tcfk0jf2ageje7xvqnnph4443h4pc4aqesuqjeywyke073qfmwral

Exit depends on the device they built and/or their server - if the device fails, exit isn't permissionless; if both fail, there's no exit at all.