I think its a good idea. Its safe, Fun, Family friendly and a great chance for advertisers. There is no real blood or gore. And i do have to agree with the first post. There are already contest. It would be VERY cool to get a world cup get for a E-Sport
People are winning money from playing competitive Fortnite so why not. If you are good enough and to play competitive Fortnite then why won't you go and try to win money? Video Games has a sport (Egames) so won't Fortnite be an add-on to that? If you are good enough to play then good for you.