Body modifications and the loss of a human soul are big points for being robots (though I'm not saying all the entrants need to be soulless or have these same qualifications). The large majority of true cyborgs are cyborgs by choice or necessity. That specific group of characters were all forcibly turned into machines. That alone doesn't make them robots, but in those specific examples their extremity of their changes effectively make them robots (enough for them to appear on that list, as there is another list specially for cyborgs on Wikipedia).
Even though it is user generated, Wikipedia has always been one of my main sources for determining if characters qualify for these contests. Basically anything on that page I am in approval of unless I find sufficient evidence otherwise.
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Still smilin'
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