If Australians aren’t the best at playing rugby, then they’re certainly the best at gambling. Casinos and purveyors of pokies have seen stark rises in revenue over the last few years because no one gambles like Australians. Horse racing has a brave and noble tradition. The largest race in the world, the Kentucky Derby at Churchill Downs, brought in nearly 300 million dollars in just one day. If the facts about Australian gamblers were ever a secret, it seems the world found out. The 2015 Melbourne Cup Carnival brought in $195 million dollars in tourism revenue alone. Australia’s Melbourne Cup,…