> The headline is supposed to tell us what the article is about.

In what way does the current title not do that? The post explains how the energy market works and answers the question somewhat literally:

> Confusingly, the flow of power isn’t really controlled on a line-by-line basis or sometimes even on a system-by-system basis. Power flows where it flows once it’s released on the grid, and there’s no simple way to keep track of who made it or who bought it at individual points on the network.

The answer being "you can't really know" which isn't always true but in general is correct.