Commission for copy trading is so that the traders that have put in the work to learn and develop their strategies can be remunerated. Commission allows the traders to be paid for their efforts so that copiers can enjoy the benefits of trading without doing the work themselves.

For example:
​If an investor makes a profit of USD 1 000 on an investment and the commission rate is 10%, he will be charged USD 100 to be paid as commission to the strategy provider.