Whenever you empty a cargo pod whether it's done by manually ejecting, uninstalling or selling the cargo, as soon as you go back into the control panel, instead of being empty they will always have 20/20 stock of consumer goods. This can (slowly) be exploited for infinite money.
[Warning]: adding test also shows up in the debug console whenever you open the control panel.
Also, standard cargo pods have two install buttons.
No mods, fresh save