Challenge: Four years ago, UNIQLO, didn't sell product online. They preferred to build loyalty "in-store". That said, their 42nd Street store had no way to track their customers. To develop a consumer loyalty program, they needed email addresses. Thousands of them.
Solution: An in-store game called Wonderqube. 100 "Qubes". 100 mystery prizes. Everything from a year's worth of socks to a $5,00 shopping spree. Mobile registration made it simple to enter. The campaign was so successful, is now used bi-annually at UNIQLO stores across the world.