AnotherGame is a mod for ToE 3.1.

I don't understand the double standards: developing mines is expensive, but developing dwellings is free.

Mines are captured in the first week, while non-native dwellings are captured in the last week (on normal maps), and that's the difference. Even for a cockroach to reach it, you still have to break through the enemy's defenses. Therefore, everything here is logical. No one will pay 5000 to improve an already unnecessary dwelling!