300,000 registered members are exempt from transaction fees in the first year.
This is an overwhelming number, and the platform's profitability will be severely reduced.
This advertising move will attract many people to this platform. In the end, it will be very profitable. I think you are underestimating such marketing moves.
Indeed, it is possible that at the beginning of the project's work is an expense, but it is those costs that bring profit in the form of advertising and in the form of attracting new users to the platform.