All of Walmart's attempts at this have been focused on making Walmart's bottom line better, which is why every one of them has failed, whereas Apple Pay is making my payment experience better, and why I use it all the time.

I’m fairly confident of this because the app has started showing me in-store purchases that were not made using Walmart Pay. It suggests they’re linking transactions at the card-number level, not just through the app.

I suspect they may also be tying in-store purchases to your profile if you’ve ever placed an online order, though that part is speculation.

Now, they may have later said that Californians have a right to "no spam" (or not) but I really don't care at this point.