The new contest codes all appear to only work in new checkout. I tried a 30% code I won in the contest in old checkout and got "Invalid promo code"
Which is fine, I don't mind using the new checkout. The problem is I cannot access my Chapters-Indigo gift card balance under new checkout (US acct) and I still have money to spend on it. I guess I will have to use it for 99¢ books