Please note offer is subject to availability and deadline, and is contingent upon completion of your sign-up. Each person can only sign up one time and only qualifies for one 97 cent hamburger. Signing up does not qualify your friends and family for a 97 cent, 4 ounce hamburger - they must each sign up individually. This offer cannot be used with any other discounted special and/or coupon (with the exception of the 1921 Club member rewards). This offer can only be redeemed on-site; it is not valid for take-out or delivery. We reserve the right to change these terms at any time. Thank you.