READ THIS, DEVELOPERS: New Colonies Should Have Increasing Maintenance Costs Using a Logistic Function Scaled to Map Size

The problem:

Infinite colony spam.

The solution:

Each new colony after a certain point increases maintenance costs exponentially, up to a certain maximum level (logistic function).  This will stop people like me from breaking the game by JUST BUILDING COLONY SHIPS FOR THE FIRST 40-50 TURNS.  

Also, social production buildings SHOULD NOT cost maintenance.  This is to encourage players to build up their worlds instead of just constantly spamming out colony ships like a robot.