Buy 2 bulk boxes of pampers, add a $20 and $15 GC to your cart, you will receive a $35 discount for the cards. Must purchase as "one time purchase" not S&S. You can subscribe in cart, to receive 5% off.
Try targeted code "PAMPERS15" for additional 15% off at checkout.
I believe the targeted code is limited to one use, but you can receive the gift cards multiple times with multiple purchases.