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Tickets would be the first-mover in my guess. The scale is much bigger than you first think.

Parking tickets, airline tickets, bus, festivals, concerts, movies, conferences, etc

All these industries have essentially parallel invented their own ticket issuance, validation, and expiration networks and they must continually pay to keep that up and running.

Offloading that to a 'public network' like BTC-LN is an obvious winner

yep and with a protocol like RGB, you can do it all without a separate blockchain. lightweight

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