@morax Not questioning their use, just looking at their price in a vacuum. Say a player has 10 mass points on the map "planned" for him, that's roughly 200 mass, meaning it takes 20 minutes to build on "average" T3 eco. If you were aiming for 30-40 minute games as the developer then you wouldn't implement this cost, again in a vacuum not considering the meta.
That makes me curious what kind of late game eco was normal in 2007 during initial balancing...
I want to stress I am basically completely wrong, just curious how and why