MasterCard asked us to create a campaign that introduced their Priceless Cities platform to New York City.So to debut Priceless New York, we decided to use the very streets of New York. Check In to the Ballgame invited people to check in to Yankee Stadium seats placed throughout New York City. Through Facebook Places, clues to each location were dropped via social media. Then, it was just a matter of finding the seats and checking in to each location for a chance to win tickets to a Yankees game.112 lucky winners got the VIP treatment at Yankee Stadium, and MasterCard Priceless Cities got millions of impressions. We launched Priceless New York using just the streets of New York, and the best seats in the house.