This morning I posted an interview with Frank Carlos Vázquez. To American officials he was a cultural promoter, but to Cuban State Security he was Agent Robin.
He informed on U.S. government efforts to cultivate Cuban artists that he said were most likely to produce work that cast the Cuban revolution in a bad light.
A summary of the interview is here.
See part 1 and part 2 of the interview on the Cuba Money Project's Vimeo channel.