Whew! that's a lot of poker. Surely most of those hands were not at BBJ tables. The promotion has only been on since June 22, 2007. The probability in the OP is definitely inflated. BTW during the first 28 days the BBJ was hit 6 times so that's about 1.5 times a week.
http://www.prweb.com/releases/2007/7/prweb541005.htm