The first problem is actually rolling the rim. It is hard, which is not disgusting on it's own, but this sets the stage. Yes, there is a certain skill involved here and many Canadians probably revel in their own particular method/skill at doing so - some, maybe not even disgusting methods. However, on the weekend I watched slack jawed as a women knawed at her rim like some sort of crazed woodland creature - maybe an effective method...but... If you have arthritis or some similar physical challenge, forget about it, you may want to have a family member roll your rim for you (more disgust..."er, Gramma, almost have it, kinda hard, my fingers keep slipping on your lipstick stains"). Maybe that is the sign of a true friend, somebody you can ask to help you move AND/OR somebody who you would ask to roll up your rim.
Second, how do you actually carry around a winning rim - in your wallet, purse pocket?...hey, there is something to look forward to fishing out later in the day!
Third, consider the Tim's employees who actually have to touch these sometimes wet, smelly, knawed bits of paper in order to redeem your donut or coffee. I notice the employees have likey said "enough is enough" and plastic rim-deposit boxes are appearing at Tim's outlets where you actually have to drop the rim bit, so the employee never has to touch it..."yes, it WAS the plasma t.v. whatdya mean you didn't see it, I just dropped it in, gimme my t.v.!".
Ya, "rrrroll up the rim to win" sound kinda silly and maybe even vaguely Scottish...but the appeal stops there. What's so wrong with scratch and win..."scrrrrrrratch and win"...?
I could go on, but my Tim's tea is getting cold and I need to limber up my fingers for when I finish : P