Fortunately, I don't shop at Walmart, nor do I have any interest on anything you sell.
Also, an escrow at this point means nothing, since you also admitted to selling the same gift cards over and over to different people.
Unless you're willing to let people spend the money on that gift card that same day, before your money is released.

Fine with me. Leave it in escrow for 12 hours. That's more then enough time to spend it at Walmart.