It just works

Generally wise advice- research, experience, intuition, and some skill: those things allow us to try to predict what the Orcs are most likely to feel about a given vehicle so we know which one they’ll have the most confidence in. Although in fairness- money works on the exact same principal- especially where not backed by gold or tangible assets. It has value simple because the majority of people all agree upon it having value. When people lose belief in the issuer of the currency- the currency is devalued. Understanding the thinking of the hoard is key to financial success.