: Machines often feature QR codes that customers can scan to provide feedback, report issues, or receive promotional rewards.
: Businesses or event organizers distribute codes (physical or digital) that act as vouchers, allowing users to bypass standard payment. Vending Machine Codes Food.
: A common myth is that these codes are programmed so owners can get free snacks without their keys, but as noted above, keys are strictly required to activate service modes. : Machines often feature QR codes that customers