Maybe I am not seeing something right...
A player may improve a Nano fabricator center in order to get additional charge for his artifact. This second charge will have a production cost of 250 and even durantium cost of 1. OK, I will improve my artifact that will give me... 25 social production.
So the math is - I am building the improvement for 250 construction to get... 25 construction. That's genius, Stardock!