No IT IS NOT IRRELEVANT It answers your demand for evidence that the term satellite state is used as a technical term and not a metaphor It demonstrates that it is not a biased Western propaganda term as claimed by Mewulwe because the term was accepted by the Soviet Union in  alongside the UK and the US or Cold War rhetoric as claimed by TFD You have your answer It IS a technical term that IS used by international institutions  including the International Court of Justice of the United Nations