Amazon’s Store Has Practically Everything, Including Many Problems

Jeff Bezos’ decision to let people sell on the company’s marketplace helped accelerate growth—and risks.

Photographer: Michael Nagle/Bloomberg
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Amazon.com Inc. once stood behind every product on its eponymous website. It was the retailer of record for items like books, compact discs and electronics. Then an unorthodox decision two decades ago by Jeff Bezos to open the company’s virtual shelves to merchandise from other sellers turned the site into the equivalent of an open-air flea market—and established its reputation as a low-priced everything store.