I saw that but Fulfilled by Walmart means shipped by walmart, right? It wasn't shipped by Evercross either.
'fulfilled by whoever' only means that you surf Business A website, and purchase Product A (costing $500) but you are paying Business B that $500 thru the Business A website, and you are trusting Business B to turn around and order Product A from Business A.
But what happened to me is that Business B ordered Product Z (worth $1.95) from Business A, and provided a random address to Business A in City D, and then Business A packs up Product Z, ships it out to City D and generates a shipping confirmation and tracking number for it, which proves they shipped it. Business B pays Business A the $1.95 and sends you a tracking number, and you see it delivered somewhere else, not yet realizing you have been scammed, and then Business B gets to deny the claim, telling you to take it up with Business A, and/or maybe the shipping company lost it, so put in a claim with them.
After a few days or weeks of generating a LOT of money very quickly, Business B gets booted by Business A, leaving the buyer and Business A ripped off. Meanwhile, Business B changes the name, the email address, and then relists on the same or other websites under a new name, perhaps Business C.
It's a HUGE problem affecting millions of people.
And Business A is just as much a victim as you and I are. (in my opinion they should STOP allowing third party vendors, but my opinion means NOTHING to billion dollar companies)
I recommend online buyers ALWAYS check the 'sold by' information.