https://www.gamespot.com/articles/free-fortnite-battle-royale-items-available-on-ps4/1100-6456773/

Since the launch of Fortnite's free-to-play, PUBG-esque Battle Royale mode last year, it's become tremendously popular. If you're among the people playing the PS4 version, you can grab some free cosmetic items right now, provided you're a PlayStation Plus subscriber.