Cheaper Than Free: -$5 Shipping at AMZN's Endless.com

This morning's email brought the following announcement from Endless.com, Amazon's new shoe and handbag site:
Dear Amazon.com Customer, We’d like to introduce you to a new site built by Amazon and that is setting a new standard in service—meet Endless.com. Just as Amazon has revolutionized the way you shop for books and music, Endless.com will change your expectations of shopping online for shoes and handbags. Our new site allows you to shop your way—using our unique category, brand, size, heel height, color or price selections-- and most importantly, for a limited time, we'll pay you $5 for the privilege of shipping your order overnight. No more waiting or paying extra to get your package fast.
Shipping isn't really free -- even when retailers price it as such -- but such offers train customers to think it is. And overnight shipping for negative five dollars? The whole direct marketing industry shudders. Thankfully, this is just a limited time offer.
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