Cashu is awesome. David Chaum would be pleased to see what you're done. I couldn't find it, but he made a cartoon explanation of an IRL scratch off card that could be used as physical ecash. It had multiple denominations on a single card, and you scratch off a few QR codes in different denominations to reveal the payment amounts for scanning by the merchant. Maybe you could team up with Madex or another artist to design a promotional scratch off card for conferences or IRL orange pilling kits.

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Widely recognized as the inventor of digital cash, David is currently leading xx network, a completely private, quantum-secure decentralized messag...