Solutions
One code, changed after it is printed
Everything below is the same idea applied to a different surface: put a code on the thing, decide later where it goes, and see what happened. The destination is editable for the life of the code, which is the part a printed QR code normally cannot do.
Restaurant menus
Change the menu without reprinting the table tent.
Product packaging
GS1 Digital Link on the barcode, resolving by who scanned it.
Digital business cards
A hosted profile per person, editable after the cards are printed.
Print campaigns
One code per placement, so you can tell which poster worked.
Events and signage
Programme, map and feedback form behind one code on the door.
Lead capture
A form behind the code, and the submissions in your account.
Landing pages
A page built here, so there is somewhere for the code to go.
Everything above starts the same way
One code, changed after it is out there. The free plan has no expiry and asks for no card.
Free forever for one person. No card, and 10,000 scans a month included.