Saint Seiya Legend Of Justice Private Server - Google [upd] -

The number one reason players switch. On most private servers, the premium currency (Diamonds/Souls) is either:

A private server (or "modded server") is a custom-hosted version of the game that operates independently from the official servers managed by Wanda Cinemas Games or Hoolai Game Ltd. Saint Seiya Legend Of Justice Private Server - Google

Summoning rates for 5-star Knights are often boosted compared to the official 4.8% rate. The number one reason players switch

Saint Seiya Legend Of Justice Private Server: Everything You Need to Know Saint Seiya Legend Of Justice Private Server - Google

Many unofficial servers are "reskins" that may only stay active for a few months before shutting down. Saint Seiya: Legend of Justice - Apps on Google Play