This morning’s eMail included a promotion from Apple :
**LINK**
https://www.apple.com/uk/shop/gifts/shopping-event
… which looks attractive
But even I am bewildered by the logic of this line from the small-print:
Qualifying purchases can receive a discount equal to the value of the eligible Apple Store Gift Card off the price of the eligible product and will be charged for all items at checkout, including the Apple Store Gift Card.
Presumably this has something to do with Apple’s accounting practices, but 
MichaelG.