Is it permissible to work for a website that offers a job posting advertisements for a monthly salary, along with a request to deposit a sum of money as a guarantee before starting work?

It is not permissible to participate in a marketing system that requires the participant to pay 20 dollars, whether the company refunds it or refunds it after benefiting from it. In the first case, the transaction is considered gambling due to the possibility of gain or loss. In the second case, it is considered a loan with brokerage, which falls under the category of "sale and loan" forbidden by Islamic law. Additionally, the advertisements may contain impermissible elements, such as immodest images or the promotion of forbidden things.