[qubex]

Yes, it is really used explicitly by algorithms employed by HFT funds, any system that explicitly or implicitly works with or through auctions, and by cellphone tower management systems. One could also argue that the Byzantine Generals Problem’s solution (the much vaunted blockchain of cryptocurrency lore) is game-theoretic in nature so the whole bitcoin & cetera crowd/craze (spending on your perspectives on the matter) could be considered to be founded upon the application of Game Theory of the algorithmic (computable) variety.