Amazon mechanical turk is a crowd sourcing platform. Here you help businesses on tasks and jobs that can be outsourced and done online by other people. Your income here is dependent on how many task do you work on. These jobs and tasks made by businesses are called 'microtasks'. Examples of this microtask include surveys, transcriptions and more (more informationin the link below).
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you can sign up in the link below:
https://www.mturk.com/worker
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