What the customer does
They scan the code on the screen, answer the survey on their own phone, and are shown a voucher QR with a short reference and a countdown. They walk to the counter and show it. The whole thing happens inside the visit.
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An optional free item in exchange for a short survey
Surveys work without a reward. When you want more answers, attach one: the viewer scans, answers, and gets a one-time voucher on their phone. The cashier scans it, enters the store PIN, and sees exactly what to hand over. The store is reimbursed at the price it listed.
They scan the code on the screen, answer the survey on their own phone, and are shown a voucher QR with a short reference and a countdown. They walk to the counter and show it. The whole thing happens inside the visit.
Scans the voucher on any phone, enters the screen's PIN, and reads the answer: a green panel naming the item to hand over, or a red one if the voucher is spent or expired. Confirming it burns the voucher for good and records the payout to the store.
You choose the item and the quantity per screen, so the reward spend is capped before the ad starts.
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