Offer valid till 02/29/2020.
Factoring in the $25 gift card, this comes to $0.2467 per diaper as opposed to $0.20 each for Costco Kirkland's.
Appears like you must pick a 'bundle' from the link below. I tried with 2x120ct of Size 4 and it wouldn't give me the gift card. It had to be 2x150ct.