The values of the dice are not random. As stated in the contest rules, one property in each set is "rare," similar to the sticker game. These rare properties are landed on only when the game server "seeds" a winning roll. Winning rolls are seeded at specific times on specific dates, and the first user to roll the dice once a win has been seeded will land on a winning piece. This allows McDonald's to declare the odds of winning certain prizes, a legal requirement for contests in most jurisdictions.