Some of them are sales staff of companies who intend to kill time between their businesses. When they win games, people can exchange the small Pachinko balls into items at the store managed by the parlor. They can buy from cigarettes to CDs, stationary, miscellaneous daily goods to food. Or, they could go outside the parlor to a money exchange place to get cashed. Pachinko is not legally admitted as a gamble, so such money exchange place are managed by someone else than the parlor.
Players can buy goods with some balls and exchange the rest of the balls into cash also.
Let's give consideration to social problems caused by Pachinko. There are problems such as tax evasion and counterfeiting prepaid cards. There are some people who are almost addicted to Pachinko games. Many of them are housewives. Some people bring children to Pachinko parlors.