Re: It starts as "Voluntary"
Besides, as a brick-and-mortar location, Walmart can consistently trounce Amazon in that niggling little necessity of everyday life that almost requires a physical presence: groceries.
Where I live, I can get Amazon Next-Day Delivery, Amazon Prime Now (delivery in 2-4 hours, driven in cars by Amazon delivery people), or I can drive 3 minutes to the Walmart, grab stuff, go through the self-checkout and be home in 10 minutes.