I have seen post that is about cryptocurrency when it concerns Nigeria and is been pushed to politics and society sub board especially when is a news about the Nigeria government saying something about
It depends on how the post was made. If the post is about mainly government and government decisions then it will likely go towards the politics and society section. Another confusion here is that people only like to single out the politics in the politics and Society section. When trying to make you analysis on if a post should be or not be in the politics and society section you should also consider if the post is more about societal issues.
And again it would have been best you bring up some of this topics you have seen and I am sure you will get concrete explanations.