Excluding Main Site Theme

Hello, I'm just wrapping my mind around the possibilities of multisite and using it for two current projects, so I just became a member here :slight_smile: My understanding so far is that if i activate themes from the super admin, they become available for all sites to use. And in order to use a theme on the main site, it must be first enabled in super admin. Problem is, i dont want users creating sites to be able to use the theme for the main site. (hopefully that makes sense) I am wondering if there is any way, plugin or no plugin, around this? Any advice would be greatly appreciated...thanks!