River Rock Casino, because casino managers had complained to the Crown corporation’s executives, and it was “all about the revenue,” the province’s money-laundering inquiry has heard.Ross Alderson, the corporation’s former director of anti-money laundering, was examined Thursday at the Cullen Commission, which is mandated to determine whether corruption or inaction on the part of police and government enabled dirty money to take root in the province’s casino industry.Alderson told the commission that when he started working as a casino investigator inside the River Rock in 2011, he was “quite taken aback” at the volume of cash flooding in through high rollers, who would typically “buy in” with $100,000 or more, carrying stacks of $20 bills.