Players have been reporting a bug in the games menu that offered them the option to join as player within a solo game, which had already prompted rumours about a spectator mode. After that, an image was posted to Twitter by user BlueNightEdgar, inviting them to a private testing session where they would be playing custom matches to help us test unreleased spectating features. Their reward? An undisclosed sum in the form of in-game currency, and free food.
Source: N4G PC Fortnite could finally be getting a spectator mode