It means that you need to find other ways to get rich.
For some reason, NCSoft decided to restrict sheer gold farming for the sake of enjoying the game, or whatever. It means that walking around the world, collecting herbs, rocks, skins, and other trash items en masse, to sell them in bulk, later on, will not do. Gold Farming in BnS is limited, to say the least. You fight for the control of resource buildings, and killing enemies grants you a reward. It all pours into your army, buildings, items, and upgrades.
You need to collect gold, ammunition, resources. To be fair, the vast majority of games have the economy.