PRIVACY.
Checkout stores your name, email, optional phone number, and the passes issued to you. That record is how Find my ticket and the gate scanner work.
The QR code carries a signed ticket ID. It does not include your email. Staff see your name, tier, and ticket ID when the code scans.
Card numbers typed into the demo form are checked and then discarded. They are not written to the database.
Email delivery is not connected. Nothing is sent to your inbox from this site.