Is money earned from selling a product, using images of immodestly dressed women for its promotion—whether you are an agent or a marketer—considered unlawful money?

Our ruling on the معاملة (transaction) being valid and the profit being lawful does not diminish the ruling on the sinfulness of the act. A Muslim should avoid sinful deeds. Promoting permissible products is permissible, and earning from it is likewise permissible, provided that the promotion is free from Islamic prohibitions, such as images of unveiled women; otherwise, the doer is sinful. The issue of عموم البلوى (widespread affliction/common predicament) does not apply here.