According to research from Newzoo, eSports revenue will reach $906 million worldwide in 2018. By 2019, that number is expected to surpass $1 billion.

That’s a lucrative market, not only for the players, but for brands and video game producers as well. Madden 19, the game featured at the tournament in Jacksonville, is part of the long-running EA Madden Franchise. Since its inception nearly 30 years ago, the EA Madden Franchise has sold more than 130 million units, totaling more than $4 billion in revenue.

eSports players, not unlike traditional athletes, can rake in big money: Tournaments can boast millions of dollars in prize money, which is typically split between the players on the winning teams. That means the world’s very tip-top players can easily earn seven figures in a year. Teams and event organizers also benefit from tickets sales for these competitions. That popular League of Legends tournament from 2017? It generated $5.5 million in ticket sales.

After the shooting, EA Sports canceled the three remaining Madden Classic qualifier events to review safety protocols for competitors and spectators, according to a release issued by the gaming company.