By “original Mechanical Turk”, I am clearly referring to the chess player inside a box. It was a con because the system was presented as an automaton, when it is simply human labour.
And I am calling Amazon’s “just walk out” service also a con because it was touted as automatic, even if also being mostly human labour.
I am not calling “Amazon’s Mechanical Turk” a con. It is exploitative, as you said, but it is not a con. People know that it is human labour, and Amazon does not try to hide it.