Fans love creating "Girls' Night Out" artwork featuring the entire female cast. Seeing Shizune relaxing with Tsunade, or Ino and Sakura putting aside their rivalry for a selfie, provides a slice-of-life entertainment that the main plot sometimes lacked. This desire to see these powerful women interact outside of combat drives a massive amount of traffic and media consumption.
This user-generated content keeps the "entertainment" aspect of the franchise alive long after the manga has ended. Fans love creating "Girls' Night Out" artwork featuring