Yeah, I added MTurk as a possible explanation in one of my edits before putting up the post. It would be a more expensive, but harder to trace way to do the sam

Yeah, I added MTurk as a possible explanation in one of my edits before putting up the post. It would be a more expensive, but harder to trace way to do the same thing - MTurk is effectively a human bot. One giveaway would be that most of those IPs are likely to come from outside the US, and since most of these sites only serve US (and Canada/UK in the case of PM), it'd be easy to tell that something was off if you knew that fact.