Project Cybersyn, beyond it being remembered as an interesting experiment, hasn't really had any lasting influence. After the fall of Allende it was promptly dismantled, so its influence there was of course limited.

As a model it wasn't really adopted or followed in other socialist countries. In Benjamin Peters' "How Not to Network a Nation" he discusses Project Cybersyn briefly, and notes that it was influenced more so by the British and South American (might have even been specifically Chilean, I forgot) cybernetics scene. As I recall it was to do with the conception of networks as a 'brain', and analogies with systems as animals.

The Soviets did have their own plans for a national economics coordination network, though intended to be quite different to Cybersyn, in the form of OGAS. Peters suggests however this comes from a different 'scene' and with a different conception of a computer network - with the network as a whole body. So it wasn't really a product of Cybersyn but a parallel development.

If the Soviet experiments with economics and computing interests you, you might also like to have a look at an older book - Martin Cave, "Computers and Economic Planning: The Soviet Experience". Cave looks at other network proposals/implementations other than OGAS, and their challenges/failures. That being said it can be a pretty dry read and not always easy to get a hold of.