When in a country gambling isn't allowed then in that situation underground gambling is going to take place. The gamblers can't control their urge for long time and they've to gamble no matter if it's allowed or not allowed. In many areas where gambling isn't allowed, the friends, or same minded people have created their private places where they'll gamble and have fun. While, in areas where gambling is allowed there's no need of underground gambling.
These underground gambling platforms become popular here gambling is prohibited. In the Northern part of my country where gambling is not accepted because of religious beliefs such platforms exist in the secret. I am not interested in playing on these platforms because they are mostly controlled by gangs. Some of these gang members have connections with law enforcement agencies who they give commissions. Sometimes there are raids by police if they were not given their cut or if a new top officer resumes in that location. Disagreements in those gambling centers sometimes lead to fights since it is an illegal operation. It will be better to use crypto casinos secretly than to risk your security gambling in these underground platforms.