Resource Denial: PS1 vs PS2

[Figment]

So overstretching effect of resources? What if resource distribution (vertical) per amount of terrain held (horizontal) was parabolic?

Let's take resources distributed of your empire around a third of the terrain you are at standard, or a 100% resource gain. Now, if you capture more, this amount increases up to a certain point. Let's say if you hold 55% of the continent, you're at your max gain and get around 125%. After that, it slowly drops back to 80% gain ("logistical overextension effect"). If you have less than a third up to 0%, gain drops to around 60%. This way there's still an advantage in gaining territory, but the attrition gap might just become a bit smaller and easier to overcome.

And again, what's the global effect of holding terrain? Is it averaged over all territories? Sorted continent by continent? Modifiers?