METHOD FOR PROVIDING A BONUS ITEM TO A USER ACCORDING TO AN ITEM PURCHASE AND SERVER PERFORMING THE METHOD

摘要

In order to provide a bonus item to a user who has purchased a preset item, a cumulative value is changed if a bonus item is not offered to the user who has purchased the item, a bonus item corresponding to the changed cumulative value is determined, whether to provide the user with the bonus item is determined if the user purchases an item, and the bonus item is provided to the user if it is determined to provide the bonus item to the user.