Similar to mining, chosen validators receive an amount of newly minted tokens as a reward for their participation. One of the biggest benefits to this system over crypto mining is the hardware requirements are significantly lower, meaning more people can become validators. This, in turn, increases a project’s decentralization and further improves the network’s security. It also has the added benefit of reducing the amount of energy required to power the network.
Source: https://www.coindesk.com/learn/can-crypto-go-green-how-to-invest-in-eco-friendly-cryptocurrencies/