As secrets go, this didn't seem to make it very far. Czeslaw Milosz's notice of the Congress for Cultural Freedom in _Milosz's ABCs_, says "you could smell big money a mile away, and the French, who were stewing in their anti-Americanism, boycotted it totally."
There is something amusing about the US government, through whatever agency, funding Abstract Expressionism hardly two decades after building all those post offices with WPA murals that I suppose one might call Socialist Realist.