I think this is a new promotion. The sale price is just OK but $15 in VUDU credit makes it decent. Not sure if this is available in store also.
https://www.walmart.com/ip/Roku-S…/300825724
"Purchase and activate a qualifying Roku Streaming Stick+ from Walmart, while supplies last and receive a $15 movie & TV credit from Vudu. ($10 through product receipt and $5 in the box). Vudu offers a premium entertainment experience utilizing the latest video streaming technology, including 4K UHD and Dolby Vision HDR. With Vudu get access to over 100,000 movies and TV shows. 1. Enter $10 promo code from product receipt and $5 promo code from inside the box at watch.vudu.com/roku "