Is the investment feature on an e-commerce website – which allows sending a sum of money and earning daily un ثابتة profits ranging between 10% and 50% based on a list of purchases and sales sent by the website – considered interest or usury (riba)?

For investment in banks, companies, and websites to be permissible, the following conditions must be met:

1. Knowledge of the investment field and that it is permissible.

2. The capital should not be guaranteed unless there is negligence or dereliction of duty.

3. The profit should be determined as a common percentage of the profit, not of the capital. An unknown profit percentage invalidates the transaction Islamically.