While I agree that a live test like this might be a good indicator, I don't know if the candidate would get a vibe that you're trying to get free work (A bunch

While I agree that a live test like this might be a good indicator, I don't know if the candidate would get a vibe that you're trying to get free work (A bunch of suggestions to try after you show them the door). Maybe using some other site, like a competitor or something unrelated.