I never realized Amazon's automated checkout technology was just an outsourced, creepy, Mechanical Turk:
"Though it seemed completely automated, Just Walk Out relied on more than 1,000 people in India watching and labeling videos to ensure accurate checkouts. The cashiers were simply moved off-site, and they watched you as you shopped."
https://gizmodo.com/amazon-reportedly-ditches-just-walk-out-grocery-stores-1851381116
Amazon Ditches 'Just Walk Out' Checkouts at Its Grocery Stores
Amazon Fresh is moving away from a feature of its grocery stores where customers could skip checkout altogether.Maxwell Zeff (Gizmodo)