content: Leapforce et al. are work-at-home gigs, at least when it comes to the evaluators. They hire people from all over the world (though mostly in the US). They are more or less universally crappy to work; but as far as unskilled at-home labor goes, the money is decent.  Feedback from the evaluators is checked against how the algorithm would "rate" the result. Based on how close the evaluator was to matching the algorithm's result, the evaluator is given positive or negative feedback concerning his/her rating. The evaluators are mainly making sure that the algorithm is functioning correctly, not choosing what you see when you search for something.  If enough evaluators mark the same results "incorrectly", then Google may decide to go about tweaking their algorithm. As such, evaluators only influence search results in a very tangential sense; they act more as debuggers or testers than anything. I doubt their Youtube video rating system works much differently. That said, I'm not sure which is worse: that Google is nefariously attacking wrongthink, or that they may have put that power into the hands of a bunch of luddite, commie puds.