What is the ruling on organizing commercial exhibitions for cars and means of transport, and what is the ruling on the sin resulting from marketing luxury products, or from the exhibiting companies' use of female elements, music, and images in marketing, or from the participation of companies that deal on usurious bases?

Organizing commercial exhibitions is permissible if the goods displayed are lawful, and the promotional methods do not include anything forbidden by Sharia. Extravagance and squandering are prohibited, and they are defined as: "spending in disobedience to Allah Almighty and in an undue and corrupt manner." The use of women and music in promotion and marketing is forbidden, and participation in it is not permissible due to its involvement in aiding sin and transgression.