In order to use the add-on Brand Portal feature, it must be enabled. Then, once it is ready for use, there is no limit in the number of brand portals or sub-spaces that users can create.
Here’s how it works:
To enable this feature, the specific feature flag must be set in the configuration file.
In addition to setting the feature flag, open MM and select ‘Brand Portals’ from the top right settings menu. Then click the button 'Enable portal styles'.