Prioritize productive SCPs
Income is shown per second in official artwork, so compare actual base output before spending upgrade cash.
Collect while you progress
Return to the base regularly. The 55 Robux Auto Collect pass automates collection while you move around; it does not claim to increase the rate.
Understand the 2× multiplier
The 79 Robux Double Money pass applies 2× cash to every SCP on your base and is described as permanent.
Offline formula unknown
The developer confirms offline earnings but does not publish the cap, efficiency, or exact calculation.