Rare Supply Drops are currently on sale in Call of Duty: Black Ops 3.
If you use Call of Duty Points to purchase your supply drops with you will receive them for 50% off from now up until 10:00 AM PT May 31st.
So if you are saving your points up to buy in bulk now would be a great time to cash them in and capitalize on the half price offer.
Remember: You must use Call of Duty Points to buy the Rare Supply Drops with, not Crypotkeys, or you will pay full price.