Dota2 has been the leading prize money in esports for a very long time now. The International is the marquee event for Dota2 and has been one of the best tournaments for esports in a big way.
While Dota2 might not have the biggest viewership numbers, it has always been the biggest in terms of prize money. Most of this money comes from crowdsourcing and only 25% of the collected amount goes to the tournament prize pool. This year’s tournament saw the prize pool almost reaching $25 million.