Cheap eat at Wendy: Double Stacks 4 For $4 Combo is still in their system.
I'm now eating that combo at Fountain Valley SoCal. I was about to order other 4 For $4 combo and all of a sudden the lady told me the Double Stack offer is still available so I took it. It's not on the store's window or on the menu inside the restaurant but still in their database, all you need is just ask them for it.
I also got the free Junior Frosty key chain: happy lunch for me😁