Are you aware that you can use the WC vouchers, which you receive when you visit the WC in Migros Zurich City, without restriction? The same barcode is always printed and once you have one of these vouchers you can have CHF 1 deducted from the WC every time you go to the checkout.

Another problem, but also worth mentioning: If I receive digital vouchers 5X Cumuls, then I can redeem them once - but if I take a voucher from Migros magazine, for example, during the same promotion phase, then I can use it for every purchase in which it is valid from the date. So there's still some catching up to do between digital and print