People value free shipping because shipping is a scam in a lot of cases. I used to work for a company that made logistics software. One of our customers was o

People value free shipping because shipping is a scam in a lot of cases. I used to work for a company that made logistics software. One of our customers was one of those cable channels that hawks merchandise around the clock. You would buy a ring (looks like a real diamond!), and when it arrived you realize "hey, this is just cheap costume jewelry" and send it back. They'd happily refund the price and express hopes you'd be happier with future items. And they didn't care about the return, because they were charging you $8 (or whatever) for non-refundable shipping and only paying the shipper $1.20. So in the end they made $6.80 for selling you nothing.