; (2) the business models used by these transnational criminal organizations, including U.S. domestic and foreign activities for precursor purchase or production, movement along the supply chain, manufacture of the completed product, marketing, distribution, sales, and return of proceeds; (3) the overlap of the business model of human trafficking and the trafficking of synthetic drugs and related illicit finance; (4) the use of online illicit drug markets and the use of social media for the marketing, sale, and payment for synthetic drugs; (5) financial methods used by such transnational criminal organizations, including— (A) payment; (B) money laundering; and (C) repatriation of proceeds; (6) the use of social media applications like Snap Chat, Discord, and Facebook and payment applications like CashApp to facilitate financial transactions for synthetic drug trafficking, especially among young people; and (7) U.S. Government activities to combat illicit finance related to the trafficking of synthetic drugs, including— (A) interagency collaboration, including personnel detailed to other agencies to support the effort to combat synthetic drugs trafficking and related illicit finance; (B) intergovernmental collaboration; (C) intersectoral collaboration with the private sector, including the business and non-governmental communities; and (D) identified gaps or resource deficiencies in combating the trafficking of synthetic drugs and related illicit finance in the coordination and collaboration activities described in subparagraphs (A) through (C). (b) Report required Not later than the end of the 1-year period beginning on the date of enactment of this Act, the Comptroller General shall issue a report to the Congress containing all findings and determinations made in carrying out the study required under subsection (a).