There are several ways to make a profit, life would be pretty boring otherwise. Examples include:
- brand prestige, goodwill, loyalty
- the network effect
- walled gardens
- switching costs
But none of these factors are so powerful that a company in a free market can extract exorbitant profits from a customer unwillingly paying with no better choice. Note that intellectual property would not exist in a libertarian system. Of course, people sometimes buy products/services without doing their due diligence or simply not caring enough about ease of quitting, ease of repair, control, etc., and later face difficulties, but that is simply the consequence of their own decisions.
A customer that can afford it may willingly overpay for a product due to brand affinity/prestige. Even otherwise, there are 8 billion people on the planet. Getting $10 profit from 100 million people means a billion dollars in profit. None of the 100 million people need to have been poor or exploited; small profits per person can result in a billionaire simply due to the large human population. This is not to say that all current billionaires obtained all their wealth through such innocent means – many have used violence or state assistance – just that it is possible.
