RE: How would you go about explaining to a person who does not play Splint ...

I merely explained the burn mechanism to level up cards. Then I added that each card is an NFT. "How do you mean, burn NFT?" I said that's exactly what I mean, burn them like Vitalik Buterin burned that billion USD in SHIBA tokens. You guarantee make money from your NFT's if the game holds long enough, as card supply drops due to burn and demand for the cards increases.