@Dave E , this is true. Lease cash is gone. The reason is that the vehicle has lost so much value already that no finance company is willing to assume the risk embedded in creating a lease. Enough lease cash couldn't possibly be offered to make it worth the risk and the manufacturer will not do so either.
The behind the scene facts are this. Kia paid out a lump sum to each dealer for remaining 2018 MY inventory as of April 30th. On a $52,000 MSRP Stinger GT2 I am guessing it was in the range of $10,000 dollars per car. Thus, while your benchmark acquisition price was invoice less incentives, you now need to target 10,000 less than before to purchase. Leasing will not be a viable option.
The good news is that the dealer could afford to sell you that $52,000 sticker GT2 for $37,000 or less.