I have a Costco card and my wife has prime membership, the best of both world’s. I get cash back and she gets free shipping. I probably should shop at Walmart more but I despise Sam’s as every time I used to go in there the employees at the checkout had spirits that just screamed how they hated their jobs, very depressing. Unfortunately I’m starting to notice this as well at some of the non union Costco stores.P.S.- article in OP was written by an employee of Bezos , hardly un-biased.
