Various DLC sets were available for users to purchase Special Supply Tickets. These sets included contracts or Stocked Fuel, and typically cost the same amount as purchasing the contracts or Stocked Fuel separately, making the tickets a free bonus for the same price. The amount of tickets in these DLC sets were varied, steadily increasing since their inception. Since these sets were only available for one purchase at a time, players purchasing multiple sets of the same type had to wait until the next round of DLC sets were made available, typically within 1-2 months.