AMC Theatres Free Wednesday Popcorn (ON & QC)
If you join the AMC Moviewatcher Network for free, you can claim a free popcorn with any movie if you visit AMC Theatre on a Wednesday.
As well as the above freebie, you also collect points on your movie visits, which can be redeemed for free tickets in the future.
Once you're signed up, you can print a temporary card to use at your local theatre, and they will mail you the proper one within 4 weeks.
I was testing this deal out in the signup process, and it mentions that only certain theatres participate in the program. So therefore only those of you in Montreal, Ottawa, and the Toronto areas will be able to make use of it.