If only there was a way to rob digital money...
Advantage: All stations 1..6 get connected nonstop to cities 0 and 7, while passengers going from 0 to 7 only need to stop once. Of course, this requires each car to be motorized and automatically controlled. Also, it only works if you're going from station 0 to n or from station n to 7, not from n to m. Additionally, the idea is surely not original so feel free to google that for me.
Sentient plasmoids are a gas.