Your workflow is unique 👨💻 - tell us how you use Dropbox here.
Please please please can you add a feature that allows folders to be excluded from the Dropbox account (on windows and mac). For sure I'm not the first person to request this, but I'm yet to find a g...
FYI I've posted a different suggestion that proposes a minor but potentially very useful functional improvement to Selective Sync that would greatly help with this kind of use case without requiring a new, GUI-less mode of operation that is less suited to non-technical users (i.e. ignore files), and so is hopefully more likely to be implemented.
Selective Sync should ask where you want to remove files from