I'm pretty sure he's referring to https://www.mturk.com/worker https://www.mturk.com/worker, the name of which is itself a reference to https://en.wikipedia.org

I'm pretty sure he's referring to https://www.mturk.com/worker https://www.mturk.com/worker, the name of which is itself a reference to https://en.wikipedia.org/wiki/Mechanical_Turk https://en.wikipedia.org/wiki/Mechanical_Turk