This seems like it is designed mostly not for the stated purpose, but rather to solve some data collection problem that Amazon has. Note the emphasis on full-length photos and photos from all sides including the back, something they couldn't get simply by scraping, say, http://lookbook.nu, because normally most people in sites like that don't take photos of the back.
Indeed - it would work great for training a neural net for recognizing the human form (or specific humans' forms) from any angle, instead of relying on conventional social media images which seem heavily front-oriented. Now when you happen to be walking away from the camera or trying to hide your face, ML will recognize you anyway!
