Buy Neutral: How to set up
When you add this mod you have to make sure you enable commerce, otherwise the mod won’t do anything and players won’t be able to create purchase orders at all.
Also be careful with the multiplier. When you set the multiplier to high, buying neutrals will get extremely inefficiënt but setting it to low, it becomes extremely efficiënt. The bare minimum in my opinion is 1, although it is possible to set it to 0. But by doing so you will give players the possibility to buy every territory they can fully see for free, resulting in a massive auction where the players who know what is listed above (how to use) will get a massive advantage.