1. Collecting bets: Ancient casinos usually set up various gambling games, such as rolling dice, playing cards and rubbing mahjong, and then collect bets from participants. Participants usually bet more in order to win more money, and the casinos took a certain percentage of the commission.
2. Providing high-grade meals and accommodation: In ancient times, casinos usually provided high-grade meals and accommodation services to attract more participants to come and gamble. These services not only increase the income of the casino, but also attract more high-end customers for the casino.
3. Creating illusions: Ancient casinos would also create some illusions to attract more participants. For example, they would hire some people to play the role of gambling gods or masters, so that other people would think that these people were the real winners, thus attracting more people to come and gamble.
4. Drawing lots and selling lottery tickets: Ancient casinos would also make money by drawing lots and selling lottery tickets. They would set up prizes for participants to win by buying tickets or participating in lotteries. These tickets and prizes were usually carefully designed and priced to ensure that the casinos were able to make enough profit.
5. Protection money and black money: In ancient times, casinos would also charge protection money or accept black money from some people to ensure that their interests were not jeopardized. These people are usually local powerful people or members of triad organizations.