I'd even add a time factor then.
Use case:
- Print a QR sticker, every 100 blocks replenish the faucet with some set amount of sats. Make them available for claim for the first n users.
- Stick it somewhere in the streets. On the public transport, etc.
- Or listen, my dream use case which I thought about for a while and didn't know how to do. Go climb some tough mountain, post in at the top as a Bitcoin geocache. (Make bitcoiners climbers and climbers bitcoiners).
It could probably be adopted quite extensively for zapvertising as well.