I can handle rejections if they are warranted. I try to do quality work, but the needless rejections are scary.
What makes it worse is when a requester just doesn't respond. It's almost like they forget real people are on the other end of the HITs working and some working to provide for themselves. Communication goes a long way.
Out of curiosity, do you only contact the requester via mTurk or do you ever email them directly (like when they provide their email at the beginning of a survey)? I was recently rejected by a researcher conducting a survey with the reason being "Survey/MTurk ID not found in dataset" which is complete B.S. because I know I was super careful to complete everything correctly. Also, a bunch of other people on TO are having the same problem.
I contacted the Requester via the "Contact Requestor" link from the rejected HIT, but 2 weeks and no reply... So I'm thinking of contacting the Requester directly and cc'ing their institutional review board (IRB) since I actually have all of that information. Also, since I'm not the only one I figure that the IRB would like to know if she/he is stiffing research subjects out of promised money. Would that be overkill?
I'm new and still learning how to navigate all of this.