The reason why you are having a problem finding practical uses of game theory is for some strange reason economists have decided to call the whole field Mechanism Design [0]. Once you know the right term to use you will find lots of examples.<p>0. <a href="https://en.wikipedia.org/wiki/Mechanism_design" rel="nofollow">https://en.wikipedia.org/wiki/Mechanism_design</a>
Some smart people are using game theory to mitigate cancer acquired resistance to drugs:<p><a href="https://github.com/cunninghamjj/Applying-evolutionary-principles-to-optimize-control-of-mcrpc" rel="nofollow">https://github.com/cunninghamjj/Applying-evolutionary-princi...</a>