Tim Hortons Totally Screwed Up "Roll Up The Rim" This Year

Tim Hortons has admitted that they screwed up during this year's Roll Up The Rim To Win promotion.
Several Canadian customers got a weird surprise when they rolled their rims this week. Instead of a message telling them that they had won a prize or not, the rim was blank.
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Tim Hortons doesn't know how many cups are affected, all they know is that so far the cups have been found in Alberta and Newfoundland and Labrador.
@TimHortons 0 for 2 on any message at all on my Roll Up cups today. Methinks you need to contact your printers. pic.twitter.com/Tj3CkcIIuV
Timmies says that all the blank cups were supposed to have the message "Please Try Again" so the prizes and odds should not be affected. But as a special bonus, if you do find a blank cup, you can trade it in for a new cup and a free refill.
That means that every blank cups is actually a winner!