I still have the 2-fold and 5-fold vouchers in paper form in my wallet, so I can decide in a flash whether I want to redeem the voucher(s). I ALWAYS activate all other vouchers (multiple points on certain products etc.) IMMEDIATELY after receiving them. (Online in the computer! I don't even have the app.) And it only accepts these vouchers if I also buy this product. I think this is the best solution (at the moment), as long as you can't cancel the 2-fold or 5-fold receipt immediately once it's been activated, the Cumulus has been timed and it's been used for a small purchase.
I'm often annoyed by customers who pull out their cell phone at the checkout, then first look to see which receipt they want to activate and because they don't have a good connection, it takes soooooooooo long or it doesn't work after all and the line gets longer and longer and longer................?
Guys, it's much easier and quicker as described!