I wonder if they're using it as a loss leader--taking a loss on the delivery costs in return for getting more customers, and making up for it in bulk sales. Honestly, I don't know much about how that works.

They do have a pickup service at our local Wal-Mart, where you can place your order and they'll bring it out for you. Personally, I'd still rather walk around and look at the stuff, but you're right about standing in a queue.