He had a masters batch up and a non-masters batch up. I don't think he pulled the regular batch, it just dried up. Afterwards there were still some of the masters batch up.
I'm not really sure who you are but I'll let you glimpse into the abstract logic anyway. You know how you stagger refreshes in PM to avoid errors? That same tactic can be applied to your queue using code to create a "second" queue that doesn't submit in real-time (but at intervals with randomized offsets)
new thread http://mturkforum.com/showthread.php?27437-Can-t-Find-Great-Hits-9-22-Making-Money-on-Monday!