I see a lot of them on the Star Billiards streams in Philipines, don't know if that is in tournaments or money matches or just practice. From what the commentators have been saying in the videos, there is not much gambling in the China/Japan areas. I although thought that the players were supported by whatever sporting structure they have, basically they take them out of the general population to train for the sport and feed/house them.
I remember a Japanese player that was not playing safeties much and Buddy Hall asked Grady (I am pretty sure it was those two commentaing, but not 100%) if they played for money over there. Grady said No, Buddy replied: well, when they start playing for money, they will play more safeties.