Thinking about this again. 

There are other easier ways to do physical sign up as well. Like if you want to sign up churches, have everyone download an app, make an account, scan a QR code physically that whitelists their account, done. nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn 

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