Is this any different than a store coupon, basically?

Store issues coupon.

Store outlines terms and conditions regarding use and redemption of coupon. (Usually coupons are NOT for resale or any other use NOT outlined... hint!)

Potential customer obtains coupon.

Customer presents coupon and makes demand for redemption.

Store redeems coupon, NOT customer.

Customer receives what store expressed would be the item(s) provided at redemption.

Customer cannot force redemption; customer can only present coupon and make demand.

Store is self-obligated to perform in trust/agreement outlined in terms and conditions.

Terms and conditions may also outline what recourse customer may seek for failure to perform by store and who has control over deciding the recourse.

Customer is NOT liable for store's failure to perform.