Dairy Queen Coupon: Get a buy one get one free Blizzard coupon when you sign up for the Dairy Queen Blizzard Fan Club. The printable coupon will be sent to your email address along with other special offers, flavor updates, and contests throughout the year. DQ will also email you more buy one get one free Blizzard coupons for your birthday and your anniversary, plus other random two for one Blizzard coupons throughout the year. Blizzard Fan Club members will be the first to hear about new Blizzard flavors and treats and will be part of the team that gives opinions on new products.