Here it is from the government. And I will tell you, it is no game. The casinos enforce it. The world of the SAR is very strong and goes into play between $2,000.00 and $3,500.00 if the player is not a regular known ID on file player, etc.
https://www.fincen.gov/sites/default/files/shared/sar_guidance_casino.pdf
https://www.fincen.gov/sites/default/files/shared/sar_guidance_casino.pdf