Free plan user limit exceeded with only 2 users

[jknopp]

When attempting to push a commit I'm being told I've exceeded my user limit, however the workspace only has 2 users.

I confirmed in the Workspace settings screen where it says "Workspace users 2". It is a new workspace so no others were invited.

Is there undocumented considerations to the user limit?

eg. I have 2 workspaces (each has 2 users, with me of course being common to both) and had a third was was entirely deleted some time ago (dead project). Is it possible ALL historical users for all workspaces count towards the total? The documentation certainly does not suggest this.