Finally got a reply from Amazon about my account being flagged...
"Thank you for your patience while we reviewed the warning we sent to your Amazon Mechanical Turk (MTurk) Worker account. Upon review, our investigations team determined that the appropriate action was taken. Per our initial email, your account was flagged for using robots, scripts, or other automated methods as a substitute for your human intelligence and independent judgment, which violates Section 3(b) of the MTurk Participation Agreement.
MTurk is a marketplace for completing tasks by exercising human intelligence. We take this seriously, so if you continue this prohibited activity to complete HITs in the future or otherwise fail to make a conscientious effort to provide complete and accurate responses for the HITs you submit, your account will be suspended without further warning. "
This is so frustrating and unfair. I have literally never, in my 6 or so years of working on mturk, used and automated method to complete HITs. Not once. So the fact that they are accusing me of this and think they have taken the appropriate action is scary. They can just shut down our account for no reason. I am a single mom and this is the only means of income I have right now. It would be devastating to my situation if they randomly suspended my account.