Samsung is again offering a free Qi Wireless Charging Pad in its latest Samsung Pay promotion. The company has offered various different free gifts and credits for new customers who add cards to the service since it launched.
All you need to do is add a supported credit or debit card to Samsung Pay on your phone, and then you will be able to redeem the offer. You don't need to make any purchases with the card or anything, just simply add a card for the first time and you are qualified. After you do so, go back into the promo area of the app to copy your coupon code and visit the Samsung store to make your "purchase."
You'll only have the choice of the black version, and this again doesn't seem to be the Fast Charge version, but it's hard to argue with a free wireless charger either way.
This promotion runs from March 2 through March 10, so if you grab a new Galaxy S7 (or any other Galaxy S or Note from the last year), be sure to add a card as soon as possible to redeem this promotion.
Thanks for the tip, @carltonhimself!