The Walmarts by me are odd. There are 3 within a short distance that I've been checking regularly.
Luckily, the closest one seems to be stocking about every week or so. I picked up the Tatooine Luke wave a few weeks ago and have noticed it replenished at least 3 times.
Unfortunately, the next closest Walmart has had empty pegs, except for a lone Fennec and Ahsoka for a few months. They also have those extra security tags on them.
The 3rd Walmart did not restock after the Osha/Mae wave, clearanced them shortly after Christmas, and now doesn't have TVC pegs at all.
Wish I had gone into Toys R Us to take a look around one last time before they closed up shop, but I was out of the hobby and didn't even know that was happening

One of my fondest memories from collecting was Midnight Madness April 23, 2002 at the Tustin, CA Toys R Us. The guys that got to the pegs first were handing figures back to all of us like a bucket brigade, and some just asking "You got this one yet?....ah screw it *toss it in your cart*"
Maybe I should drive up and pour one out on the curb for the anniversary this year.