One code, several destinations.
A restaurant prints one code. Before 11am it opens the breakfast menu. After 11am it opens the lunch menu.
crumbs-cafe.co.uk/breakfast
On weekdays before 11am, send people to the breakfast menu.
On iPhones, send people to the App Store.
For the first 100 scans, send people to the opening offer.
A dynamic code can change where it goes, even after printing.