In 9 years, MLG has gone from less than 100 people attending a cramped room with 1 TV per team. Four years later, it's broadcasted on TV and people are getting sponsorships from companies like Red Bull. Now, it's over thousands of people attending the events, hundreds of teams competing in 3 titles, and so many people watching the livestream, it crashes almost every time it's on. I think it's safe to say that in 10 years they will probably be making about as much as a league such as the NBA or the NFL, today. Professional video gaming is the world's fastest growing competitive sport.