Earlier quoted context omitted.
Probably none, given this complaint is focused on money services Walmart provides.
Walmart Money Center has been a pretty large component of "manufactured spending" which is not the same thing as churning but churning is often used as an umbrella term for all point earning hacks activities.
These days, I think Walmart is not the easiest route to liquidate gift cards though. They used to allow some silly things like combining many gift cards to buy one money order, but are at least supposed to restrict it now.