There is no functional, public "private server" for the mobile game that allows for free Saint Quartz or custom rates.

However, this freedom comes at the cost of security, stability, and community support. While they offer a fleeting taste of ultimate power, they lack the longevity and competitive integrity that define the Fate/Grand Order experience.

Here is the honest truth for the average Master:

FGO private servers offer an alternative gaming experience for players seeking more flexibility and freedom. While there are benefits to using private servers, it's essential to be aware of the risks and considerations involved. If you're interested in exploring private servers, make sure to research reputable providers and follow best practices to ensure a safe and enjoyable experience.