Is investing in a website that offers monthly profits and a profit margin ranging between 12% and 17% for a specified period, with the principal amount returned after the period ends, considered usury, especially since the website's mode of operation is unknown and it relies on shipping goods from one country to another?

For investing money to be permissible, the project must be halal, the capital must not be guaranteed, and the profit must not be known and predetermined in advance. The two parties must agree on a common percentage of the profit for each of them if a profit occurs. It is not permissible to stipulate a fixed amount of profit or a percentage of the capital, because this invalidates the contract. This condition is based on the consensus of scholars, because stipulating a fixed amount may lead to one party obtaining all the profit or a part of the capital, or harming the other party.