E-sports — which is to say, competitive, professional online video gaming — have exploded in popularity in recent years.

In fact, experts have predicted that e-sports viewership is likely to surpass that of traditional sports leagues, including the NBA and MLB, by 2020. Indeed, esports revenue is likely to climb to more than $900 million this year as television channels like ESPN continue to incorporate e-sports into their daily lineups, and streaming services like Amazon’s Twitch become more mainstream.

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