A real Basic example
A standard Farming Simulator 25 project has a 2,048 × 2,048 m playable area inside a 6,144 × 6,144 m overall area. Its import uses three tasks—DTM, vectors, and imagery—at 1 Unit each, and one export uses 1 more. That is 4 Units for a complete import-and-export cycle.
Basic includes 10 Units, and each used Unit returns after 2 hours. With the current limits, that is enough capacity for multiple standard jobs before waiting. Larger maps need more processing, so their Unit costs increase.
Why have Units at all?
I did not add these limits just to put an upgrade button in your way. Processing elevation, vectors, and imagery, generating exports, and keeping project data available all consume real compute, bandwidth, and storage.
The goal is fair usage: you can use every core feature and every supported map size even on Basic, while the rolling capacity prevents a few very heavy workloads from consuming the shared resources everyone relies on. Supporter tiers add speed and headroom; they do not unlock the core workflow.