McDonald's increased product sales using a gamification concept based on the classic Monopoly board game. When customers purchased certain McDonald's products, they received tickets representing spaces on the Monopoly game board, with the goal of collecting full sets of properties to win prizes. One loyal customer admitted the promotion caused them to regularly purchase McDonald's every October just for the game. In 2010, McDonald's saw a 5.6% increase in US sales through the Monopoly program, with many customers doing impulse buys to get tickets.