Make sure you check out this thread about common discounts for beds offered to anyone, it is recent and basically says that 30% promotions are fairly regular: Buying Sheraton Bed (EUROPE - ITALY) from Sheraton Hotel Store

Hence you may find that the 40% discount isn't such a great deal (really is 10%), unless you want to buy the bed immediately and lock it in - this is why most people on FlyerTalk seem to take the Suite Night Awards/Upgrades (SNA), that are currently valid till the end of 2021.