To join the rewards program, you will need to purchase a certain amount of items from the store. The amount of items or Millsbucks spent needed to gain access to the rewards program seems to be random. Once you gain access you will be given a membership card and receive this message: Alternatively you can purchase a membership card from a yardsale. After you have bought the card, place it in one of your rooms and save the room. Return to the Home Entertainment Superstore and you should receive this message: Here are the items sold in the rewards program: