At the end I was shown a note with "your code for Amazon Mechanical Turk". There was no explanation of what this is for (is it some kind of voucher that's being offered as an incentive for completing the survey? are Turkers being asked to do the survey and having their participation checked by asking them to say what code they were given?) and I think it would be good to make this clearer. E.g., if it's the second of those things, it could say "If you are doing the survey as an Amazon Mechanical Turk task, here is the code you need: XYZ99." (That was not in fact the code it gave me.)