Rewards
From MHWiki
Rewards are given by the King as a gift to the most active hunters. The hunter must enter a gift code (CAPTCHA) in order to receive the King's reward and continue playing. This prevents users from being able to use automated software that will cause a player to blow the Hunter's Horn even though the user is not actually playing actively. There are two forms of King's Rewards. The first one requires a Hunter to enter a 6 alphanumeric code to redeem the reward. The second type of reward requires a Hunter to type in one of 3 numbers on the screen, be it the one in the square, circle or triangle.
Gifts from the King are either Cheese, Points, or Gold. The amount received is a random value taken from a range based on the Hunter's Rank.