Except that no serious punter, or bookie for that matter, is going to go to the races with $1m and aim to make a $1m. They'll go with a $1m and expect to make 50k. That would be no fun for the BGP crowd.
I think the bigger outfits like Marsh and TA are the ones who might have or have had a chance to wreak some change there, but they seem to just moan quietly and speak with their feet.
I thought the NZTAB tote was commingled with the world pool for that race so I don't see how you would get 2 different prices, or did NZTAB run their own separate pool as well?