Limit transactions and cannot withdraw

I have been trading on the platform for more than half a year, and everything has been normal. Later, when I made a profit, the platform restricted me from trading. Rather than withdrawing. I would like to ask if the platform is like this? Only make customers lose money. Is it illegal for customers to make money? Everyone should be careful when trading at this platform. Losing money is a normal transaction, and making a profit is illegal.