Until Nov 4, there is a Buy One, Get One Free on Cineplex admission.
Go to this link:
Cineplex.com | Admission 2 pour 1
Enter an email address, and you will receive a promo code. Use that promo code when you order at cineplex.com
Just to note, that this just covers normal admission. If you're going to see 3D or whatever, then it's a few extra bucks. Use your browser's incognito mode to get multiple codes. The email doesn't have to be right. The code is given, immediately.