^^Yeah i wondered that also...Go to
ebay, they are selling packs of 100 pieces for $4... usualy going for around $20, i mean there is definatly going to be more then a "few" people winning these prizes, they are probably going to split it or something or first come first serve...
Also, i have reason to believe that they are putting out different pieces at different times, seems like the only logical thing to do
Trust me, mcdonalds wouldnt be doing it unless its rigged and they make 10 times more money then the prizes they are giving away