They tell you that you will earn a lot of money and have you deposit investment funds into a trading site. Then, they manipulate it to show profits and lure you into investing more. Later, when you try to withdraw the profits, they claim you must transfer additional fees like a deposit or bank charges. They then reveal they are scammers and say if you want your money back, you must recruit others—offering 1 million won per person introduced to the scam site, coercing you into joining the fraud.