It all depends on the competition. If you’re looking at one of the bigger Fortnite competitions, then betting can usually be done through the official sites, but there are always people streaming Fortnite through Twitch or YouTube. In fact, many of the best players who play Fortnite will stream themselves playing. In this case, betting can be a lot easier because you’ll be able to see whether or not the best players are performing up to their usual standards.