The most recent largest prize pool in an esports tournament is The International Dota 2 Championships by Valve which was held in Shanghai in August 2019 with an extravagant total prize pool of 33.34 million U.S. dollars. Topping their very own largest prize pool which is a total prize pool of 25 million U.S. dollars from The International 2018.
This shows that the Esports Industry is so large that it is also being expected to grow rapidly in these upcoming years. Especially in 2023 which is expected to reach global market revenue of 1.6 billion U.S. dollars.