When the marginal cost of creating another copy is essentially $0, the market price for the product tends towards zero. People are then willing to pay more for

When the marginal cost of creating another copy is essentially $0, the market price for the product tends towards zero. People are then willing to pay more for the convenience of having the product readily available than for the product itself. People pay for streaming services and buy stuff from app stores, because it's convenient. But if the service is not convenient enough, the catalog is too narrow, or the price is too high, piracy and free alternatives start looking more attractive.