"Microsoft may limit the quantity of tickets or Prizes per person or per household. Each household may receive a maximum quantity of 1 of each prize item over the life of the Program. If a prize is offered with multiple models, for example, a Microsoft Wireless Keyboard 1000 and a Microsoft Wireless Keyboard Laser Desktop 6000 a household may receive one of each. If a prize is offered in multiple quantities each household may receive no more than one prize of each quantity over the life of the program; for example the household may receive: 1 song download, 5 song downloads, 10 song downloads, and 20 song downloads."