You also remove the fees involved with on-chain
If you run a node you could make LNURLw links so that the funds are only moved off your node once the user takes the learning action. Plus since it’s lightning (on your own node) you don’t need to trust anyone.
If you want to try out an LNURLw you can test run http://lightning.btcforplebs.com
The LNURLw links are printable qr codes and easily written to NFC tags
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