https://www.pcgamer.com/fortnite-solo-showdown-is-back-for-the-weekend/

The Fortnite limited-time mode Solo Showdown has sprung back to life, giving players the opportunity to compete for bragging rights, V-Bucks, and—if you're good enough—an invite to upcoming Summer Skirmish events. 

Fortnite's core rules don't change in a Solo Showdown. Instead, it's a ranked ladder against other "self-selected competitors," with points awarded based on placement: 100 points for a Victory Royale, down to 25 points for coming in between 76-100. Points will be awarded for the first 25 Solo Showdown matches played, and when it's all over the top 100 finishers in each region will take home some V-Bucks.