emolument - a salary, fee, or profit from employment or office
The emoluments clause, also called the foreign emoluments clause, is a provision of the U.S. Constitution (Article I, Section 9, Paragraph 8 ) that generally prohibits federal officeholders from receiving
any gift, payment, or other thing of value from a foreign state or its rulers, officers, or representatives.
Article I, Section 9, Clause 8 of the U.S. Constitution prohibits any person holding a government office from accepting any present, emolument, office, or title from any "King, Prince, or foreign State," without congressional consent.
The without congressional consent portion of the clause is probably why the courts threw out all emolument suits against Trump after his presidency was over. By not acting against his profiteering while he was president, the US Congress by default were consenting to his actions - lesson learned.