something else to take into consideration is that tourists sometimes have more disposable income and are more willing to spend when travelling abroad them people who live in the country.
anybody knows more websites where we can get reliable stats (like each industry income and revenue) on several sectors besides gambling, separate per country?
Naturally, most of the casino profits come from tourists. Especially if we are talking about such large cities with gambling as Macau and Las Vegas. They were created specifically for tourists to come there and leave their money there. Therefore, statistics will differ on how much money casinos received from their citizens and how much money they received from tourists.