I have a large stack of Canadian Tire money. $92.55 of it.
I will sell this stack for $80 of real money. If your good at math, this sets you up for a clean profit of $12.55.
Not bad for a days work, if you can handle the embarrassment of slapping a 4 inch stack of Canadian Tire money on the counter at your local store.
While the cashier and customers in line behind you get disgruntled and impatient at the 20 minutes of time it will take to count this massive stack, you can be comforted by the fact you just made $12.55.