It looks like there is some clearer information about the limited edition LEGO Classic 60th Anniversary Collectible Booklet that you will be able to redeem at Walmart. According to the redeem page that just went live, it looks like you’ll have to purchase the vintage version of Bricks on a Roll (10715) set at Walmart stores, Walmart.com, or Jet.com between 1/26-2/28 and upload a photo of your receipt. You’ll have until 3/9 to do that or while supplies last. There are 15,000 booklets available which will be sent out 7-10 business days after your receipt submission has been processed.
Currently, the set is not available online yet and the employees at the store do not know about it yet either. I’ve been told that they might be available starting on Monday but we’ll see. I’ll be heading to my closest store to see if they’re available and report back after. If not, I’ll keep tabs for the online set and let you know when that goes live.