(Almost) nobody cares about privacy. But (almost) everyone cares about how nice they look in public. And their Instagram. They are not like what I'm coming to realize the average HN user looks like or behaves. Use your imagination freely here...
The main problem I see with this is the quality of recommendations. Amazon only carries certain brands/looks/styles; will it try to suggest shitty fashion? Both the male and female models used on the product page were dressed awfully. Will Amazon just try to go for the lowest common denominator here?
The best way I see this working is for the device to categorize users into certain style categories and then recommend clothes out of that category. But I'm wondering if the ML is smart enough to recommend CDG pants and MMM knitwear for one user and then A&F for another.
Remember, your algorithm's quality is only as good as your training data and if they're training on outfits like they used on the product page...