I just received this email from Citibank, but apparently it started on Tuesday, 11/5.
If you purchase $100+ per transaction on every Tuesday with an eligible Citibank credit card, you will receive a $10 e-gift card from Walmart. You can do this for every eligible Citi card one time for every Tuesday until the end.
The terms state that you will be ineligible for the $10 e-gift card for purchasing gift cards, but I will try it out and see what happens. This is a small money maker as Walmart gift cards are sold for 92% of the value and you will receive 10% back assuming you buy $100.
To qualify for this offer, you must make a single-receipt purchase on Walmart.com of $100 or more (excluding taxes and shipping charges), by 11:59 p.m. ET on Tuesdays, between 11/5/13 and 12/17/13, and pay for your purchase using an eligible Citi® credit card. Purchase may not include gift cards, Pharmacy, tires, Photo, customized or personalized items, Vudu, or Walmart To Go. Not valid on prior purchases or cancelled orders, and offer may not be combined with other offers or promotions. Applies to online purchases only. Citi branded consumer credit cards are eligible for the promotion; business credit cards and professional cards are not eligible. Limit one gift card per Citi® credit card, per Tuesday, per purchase of $100 or more. If a qualifying purchase is made, a Walmart eGift Card in the amount of $10.00 will be emailed within ten days of the qualifying purchase to the email address provided. A valid email address must be supplied at time of purchase to obtain a Walmart eGift Card. Use of the Walmart eGift Card is subject to the Walmart Gift Card Terms and Conditions, available on Walmart.com (at http://help.walmart.com/app/answers/list/p/34,35). Offer valid in the 50 United States only. Offer valid until 12/17/13. However, this offer is subject to modification or termination without notice.