Everyone's input is valuable and respected.

I think this is what poster Johnny Dio was referring to:

$2.2 billion in wagers, primarily on sporting events, during a 15-month period.

From that number (2.2B) and time frame (15 months), you can calculate the gang's income based on the average payout ratio of the bets.

Someone else here will have to finish the calculus because many of us just don't know the nuts and bolts of that industry.