NFC stickers cost virtually nothing when bought in bulk. Like, less than 10 cents if you are buying at extreme numbers. Programming them is dead simple as well.

It's a minor thing, but it helps. They put rfid tags on merchandise in some stores instead of bar codes, so I assume the cost is negligible.

On a tangent: That's an even better use case, actually. Rfid makes it super convenient to shop at Decathlon (sports equipment store): you just throw all your clothes in a basket at checkout and it calculates your total in an instant. No scanning, no fiddling.