Amazon will close Mechanical Turk to new customers on July 30th, TechCrunch reported, leaving existing users inside a service that AWS says will receive security and availability work but no new features. The crowdsourcing marketplace opened in 2005 as a place where people performed small tasks that software could not yet handle, including labeling images, reading sentiment, passing CAPTCHA challenges, and checking scraps of data for a few cents at a time. Later it was folded into the training economy as a source of annotation for neural networks. Its name was already a confession. The eighteenth-century Mechanical Turk pretended to be a chess-playing machine while a human being hid inside the cabinet.

The closure has the shape of a quiet labor obituary. For years, the platform helped companies sell automation while paying dispersed workers to supply the missing perception, judgment, and patience. Then the loop bent back on itself. Studies found that some workers used large language models to complete tasks meant to produce human-labeled data, turning the crowd into another surface for machine output. The old bargain became harder to defend. If the human is paid too little to be trusted, and the model is used to imitate the human, the dataset loses its last modest claim to being grounded in labor. Amazon is keeping the lights on for current customers. The cabinet door is closing for everyone else.