The US historically deployed a fake social media platform specifically to Cuba called Zunzuneo.

“This claim is well-documented. An extensive 2014 investigation by the Associated Press revealed that the U.S. Agency for International Development (USAID) secretly built and operated a text-based social network in Cuba called ZunZuneo. The program, nicknamed the "Cuban Twitter," aimed to build a large user base with non-political content before introducing political messaging to encourage dissent against the Cuban government. The operation ran from roughly 2010 to 2012 and used shell companies and foreign banks to hide its U.S. government origins. Context: The program was designed to evade Cuba's strict internet controls. After the Associated Press exposed the operation, U.S. officials acknowledged its existence but disputed its characterization as a "covert" program, leading to congressional inquiries and criticism over the use of a humanitarian aid agency for such purposes.”