I’m not surprise. Walmart isn’t directly selling them. They are available through a third party seller, in the same way Ebay isn’t directly selling the fake frames, but allowing them to be sold. I doubt Walmart is even aware. Here’s a better screenshot:
One thing to note is that the fake frames didn’t turn up when I searched for “Flow Frames”. I found them because I was looking for equipment and entered the term “Beehive” in the search box. The first listing is listed as “no longer available”, but on page 2 or 3 I found the item above.