Demand Curves Slope Down: The harder something is to do, the fewer people will do it.
People’s behavior totally changes once an action costs money. If sending an email cost you $0.001, there’d be way less spam.
The Invisible Hand: Rising prices signal falling supply or increased demand, which incentivizes an increase in production. The opposite is true for falling prices. Prices are a signal wrapped in an incentive.
The Paradox of Abundance: Markets of abundance are simultaneously bad for the median consumer but good for conscious consumers.