It's also a good reminder of how absolutely terrible most people are at gambling (judged by log-loss, like in the Kelly criterion). At the end you find out that almost 80% of people did worse than leaving the guess at 50%.
There is absolutely a metagame to this game. Those who have spent time forecasting on Metaculus will do much better, for example.
Note that this applies also outside of a casino, gambling (making wagers with imperfect information) is inherent to life.
[1] https://www.metaculus.com/home/
[2] https://www.lesswrong.com/posts/ybYBCK9D7MZCcdArB/how-to-mea...