Eagle-eyed Fortnite players have spotted a glitch which seems to suggest you could soon earn XP for completing quests.
Could Fortnite NPCs Soon Provide XP For Quests?
As pointed out by @FrenzyLeaks over on Twitter, an NPC apparently offers 50k worth of XP for completing its quest. It's clearly a bug, as no such reward has been claimed, but it could point to some imminent addition headed to the game:
We would imagine that if XP rewards are introduced they'd be somewhat lower than what's shown here, but new ways to rack up XP are always welcome!