Expired50% confidenceFactExact time
Crowdsourcing platforms such as Amazon Mechanical Turk, Scale AI, and Appen provide tech companies with hundreds of millions of labeled data items annually
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/11/2026
First Seen
Valid until: 10/9/2026(expired)
Sources
学术问卷背后的AI数据陷阱：填写前你必须知道的事
redditr/learnmachinelearning7/10/2026
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