An advertisement distribution program is configured to cause a computer 4 of an information processing device 3 to function as a first transmission control means which, when the number of advertisement points is equal to or higher than a predetermined number, transmits the link data of the shopping site to a user terminal along with the advertisement data of the shopping site, while when the number of advertisement points is lower than the predetermined number, transmits only the advertisement data of the shopping site to the user terminal 5, and a second transmission control means which, when the number of advertisement points turns from being equal to or higher than a predetermined number to being lower than the predetermined number, selects a specific purchaser from all purchasers at the shopping site, and transmits benefit information to the user terminal 5 operated by the selected purchaser.