How do lottery companies make money?

Lottery companies make money through the total funds purchased in each period, that is to say, the fewer winners, the more money they earn, which also leads to the reason why many people don't believe in lottery companies, because many lottery prizes or sports lottery tickets are usually drawn too slowly and the publicity is not good enough. Many hidden ways are not open and opaque, and executives and personnel often appear corrupt, which leads to lottery becoming a fraud tool in people's eyes.