Amazon has a service called Mechanical Turk. Businesses put up listings for small jobs and random people complete the small jobs for a set amount of money. The jobs are things like 'transcribe this lecture' or 'fill out this survey'. The goal is to connect small jobs with low-skill workers.
Some of the tasks are more involved than that and require proof of knowledge. But, that is the gist.
Amazon Mechanical Turk is a service where people can do simple tasks for small amounts of money. Usually things you would expect to be automated, especially in this day and age. I did it for a bit about a decade or so ago. Things like small amounts of proofreading, transcription, etc.
The name is a reference to a hoax device made in the late 1700s that was supposedly a chess playing automaton. In actuality it was operated by a person hiding within. It was nicknamed the Mechanical Turk because it had a model of the head and torso of a person dressed in Ottoman robes, etc.
"A workers rights group for Mechanical Turk workers says that at least dozens of MTurk workers have been suddenly locked out of the Amazon-owned microlabor platform, suggesting a widespread issue that is denying these people the ability to work and in some cases denying them access to money they have already made on the platform."