How do Tab and Tab Version counts work?
It all comes down to who is the owner of the Tab. In TabCollab, the user who creates the Project owns everything within that Project. So, Tabs and Tab Versions are owned by the owner of the Project.
If you create a Project and add Contributors, any new Tabs or new Tab Versions they add to your Project count towards your Tab and Tab Version count. Likewise, any contributions you make to someone else's Projects count towards their account.