Amazon announced some changes to qualification comparators. Once every ten years or so, Amazon makes an update to Mechanical Turk that benefits requesters.
There are three new qualification comparators available. The new Comparators, which include In, NotIn, and DoesNotExist, provide
Requesters greater flexibility in targeting HITs to specific Workers. This will allow requesters to a specify locations without having to exclude every country in the world. For example, you can now set a qualification for “Location In US, CA, UK” instead of US only or not in IN, CK, TZ...
Read more about it on the Mechanical Turk blog.