Spend $100 on your personal Citibank credit card on any Tuesday until December 5th and you will get a $10 Walmart gift card.
Terms and conditions exclude gift cards, tire, photo, customized or personal items, Vudu or Walmart to Go. Business cards are not eligible. Limit of gift card per credit card per Tuesday.
If I'm reading that correctly, you can get a separate $10 gift card for every $100 purchase for every card you have, every Tuesday. For example, if you have 2 Citibank cards, you can get 2 $10 gift cards for spending $100 twice tomorrow and then get another 2 $10 cards for spending $100 twice next week.