It does seem silly at first with the way it's worded but consider that there are a number of online vendors that have what I'll call a membership fee that among a number of potential benefits also includes free shipping no matter what size the order is. Amazon Prime is one example. StewMac (luther supplies) is another...I pay them a $39 a year fee but even if I buy a $2 item...alone...it shows up here in a few days. I order more than enough that pre-paying $39 saves me substantially over the year for what my run rate is for purchases where I would have had to pay for shipping. Whether or not these deals like Walmart, Amazon, StewMac and others offer are a good deal for someone really depends upon how much stuff one orders from them. I don't give Wally World any of my money for any reason, but Amazon Prime pays in spades for us because of the free shipping as well as other benefits, such as 5% rebates on the CC.
So when you peel back the onion from the stupid language...there's a bit more to the story. Folks who order a lot from Walmart and meet whatever the conditions are for any free shipping with the membership should come out ahead. Casual buyers...not so much. Same for the others.
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The most expensive tool is the one you buy "cheaply" and often...