Is dealing with an intermediary company for renting advertising spaces permissible in Sharia, if the tenant's profits stop at double the rental price, and the excess profits go to the company?

This transaction is invalidated if the duration of renting this space is not fixed and ends based on the profits made by the tenant; because a condition for the validity of a lease is that the rental period must be known.

Furthermore, for the permissibility of leasing advertising space and earning from it, it is a condition to control what is displayed therein, meaning it must be lawful. However, advertisements predominantly promote gambling, alcohol, usury, and nudity.