“What they do is set up a fake payment portal where money goes in and nothing comes out.”
They actually go alot further in making the scam seem legit. They setup full trading platform apps that look legit. These apps are listed in the apple store and play store, they even have real real reviews.
You download the app yourself, you setup your profiles yourself. Everything seem legit because you actually setup the acounts.
You then put money into these “accounts”, you watch the value go up and down like it normally would on a stock market. Then when you are happy with your “investment”, time to withdrawal and there’s no money to take out.