
Originally Posted by
Ulthwithian
Joketa: Well, the instant trade route (assuming the capital is on the coast) should mitigate at least a bit of the upkeep, if so.
However, the best argument for zero-upkeep Harbors would be that you start, turn 1, with a harbor in your capital (assuming, again, it is on the coast). That can have a crippling effect on your gpt until you get another city to do the trade route, and even then it probably wouldn't be profitable in the immediate short term.
I think that Carthage is meant to be an economic/coastal powerhouse. It gains huge benefits from being on the coast, and the money it will make will most likely be one of the best in the game.