After loading a save camera unzoom and popcap (and maybe income) return to default values.
It happens on maps those set their own values.

So, it seems, this gamemod does not set values on loading saves, but only on game start. But scripts of maps do.

Or, more closer, on loading saves - map's settings are applied after gamemode's ones,
but on game init - vice versa - before gamemode's settings.