Hi, just an idea: The GNU Guix project currently has a substitution server mirror in the East coast of the US.
No mirror in the Western US. The OSU Open Source Lib (https://osuosl.org/) offers hosting resources to FOSS projects... https://osuosl.org/services/ Maybe the GNU Guix project can request hosting service from them, to have a substitution mirror, for example, so more resources can be available for downloading of artifacts for Guix users... Maybe this can be expanded later to have more services for Guix and other GNU projects in the West coast of the US, in cooperation with the FSF IT? Wonder if the idea is OK.