So I admittedly don't tend to think of consumerism as a game that a consumer can win, but I just wanted to add one more route here. What if you buy a gift card on special deal that gives you an additional percentage of funds for you to spend? Such as... Buy $100 get an additional $20. Assuming this is a place that you regularly want to shop? Then you are effectively getting $20 off a purchase you were going to make anyways.
Yeah see that's what I thought, I feel like I saw a gift card like that through Sephora this year during the black Friday/Cyber Monday madness and I was really tempted to actually buy a gift card for once.