Soldak Entertainment - Space Economy
Soldak has posted a new update on their Space RPG, discussing the economy:
So how does this effect the player? Well you can't sell an infinite amount of goods to any specific race, they will eventually run out of credits. Although they might very well turn around and use the items that you just sold them. The different races also might have resource problems here and there and ask their nearby friendly mercenary for help. You can even handicap an enemy race by destroying an important colony of theirs. Think of how much damage you can do when a race has a main food planet.
With an actual economy this leaves a lot of room for quests that are real requests filling a specific need that actually matters if you accomplish it or not. It also allows the player a lot of room to effect the outcome of the galactic space race on what they do from little things like selling items to an ally or from big things like destroying colonies of enemies.