I have nearly 40k hits accepted with an acceptance rate of 99.1%. 'Garth Gehlbach' started with a descent payment and he didn't even rejected a hit. But I got a mail titled 'Account Warning.' This is the first time i got a mail like this. So be careful guys.. We regret to inform you that you were blocked from working on HITs by the following requester(s): Garth Gehlbach Requesters typically block Workers who submit poor quality work. Requesters rely on Mechanical Turk for high quality work results. In order to maintain quality, we continuously monitor service activity. Should additional Requesters block you in the future, we may suspend your account. Please ensure your work quality is at a high standard. We encourage you to read the HIT instructions and follow them carefully. We realize that this block may be a onetime occurrence for you. Should you maintain high work quality with no further complaints for the next few months we will dismiss this event.