The first 4 credits of the Balerian Central Bank are published:

Credits are exchanged for stacks of diamonds on survival servers.
The first credit worth 64 diamonds, the second credit worth 128 diamonds, the third credit worth 320 diamonds, and the fourth credit worth 640 diamonds.

These are earned by working on different survival servers, fulfilling production quotas or promoting the project.
This system is also very safe, because until the credit is collected, you cannot be killed to take the diamonds.
In the future we will be modernizing the bank functions.