I am trying to run a set of HITS like the following one: https://www.mturk.com/mturk/preview?groupId=GYMM4KWZ2XVTHZZYZWAZ In the past, such HITs have been overwhelmed with spam submissions, so following one suggestion in this forum, I set as qualification approval rate above 98% and required 500 completed HITs. We are running some small batches now, for beta testing. If you have any suggestions on how to improve the HIT, let me know.