Purchase ARM & HAMMER Hardball Lightweight Cat Litter 7 lb at Walmart or Walmart.com and submit for the rebate here to make it free after rebate.
You can also get $3 in Walmart cash by selecting the manufacturer offer on the product page listed under the add to cart button.

Purchase a Goldthread Tonic or Tonic Shot and submit your receipt to get 100% of the purchase price back. –locator

https://www.walmart.com/ip/Air-Wick-Plug-in-Scented-Oil-Advanced-Gadget-1ct-Air-Freshener-Essential-Oils/2736406421? -click the box that says “Get $4.00 Walmart Cash”(you must be logged in). Purchase the Air Wick Plug in Scented Oil Advanced Gadget and you’ll get $4 in Walmart cash that you can apply to future purchases.

https://www.socialnature.com/wellness-drinks -click activate offer and purchase a bottle of Rebbl Wellness Drink. Submit your receipt to get 100% of the purchase price back.