Ask HN: Have you ever used Game Theory in a real-life problem/project?

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.

0. https://en.wikipedia.org/wiki/Mechanism_design

Some smart people are using game theory to mitigate cancer acquired resistance to drugs:

https://github.com/cunninghamjj/Applying-evolutionary-princi...

Comes up all the time in business decision making.

Adverse Selection

Principal/Agent

Pareto

BATNA