My take is that since MGM didn't want to take the risk of banning someone because of their ethnicity (asian), since it is illegal (lawsuits reduce profit to a degree), they decided to use highly correlated variables as a substitute to achieve an approximate solution to asian campers. So querying the MGM loyalty card database for people who only play Buffalo Ascension, Buffalo Diamond, Regal Riches, Wolf Run Eclipse and other asian campout mainstays with team money or team free play, they can get rid of a large number of asian campers. Personally, I would have refined the query to also include Rocket Rumble.