Given the popularity of Snapchat, brands are adopting a similar approach and creating ads that can only be viewed for a short period of time. 16 Handles for example is encouraging fans to send them a Snapchat photo of them or their friends eating its frozen yogurt. In return, they’ll receive a coupon via Snapchat to view and redeem at the register, which is essentially a digital version of discount cards that you can only scratch off at checkout. (AdAge)