I love the experience from engagement to redemption demonstrated in this example from McDonald’s in Sweden.
McDonald’s invited people passing by a large digital billboard in Stockholm a chance to play pong using just their smartphones. The game did not require downloading an app. It used HTML5 technology to verify the location of the user in relation to the screen and allowed them to control the paddles using just their fingers.
Players who were able to keep a rally going for 30 seconds received a mobile coupon and directions to a local McDonald’s where they could redeem their coupon for food prizes.