The main blog on your network on a WordPress Multisite is the only one that uses a BuddyPress theme because it’s required to support all the different BuddyPress social pages.
Your members socially interact with each other via the social features, using the BuddyPresss theme, on your main blog.
The BuddyPress Theme
Your BuddyPress theme is where you build the community for your network.
It provides the pages that support the different BuddyPress social features including members profiles, blog lists, friends lists, private messaging, activity streams, groups, group forums, and more.
This is where you transform your network for your niche area into a thriving community by adding widgets, enabling/disabling social features and customizing your BuddyPress theme!
Check these out for ideas on how others are using BuddyPress:
- BuddyPress Showcase: 12 Unique and Inspirational Sites
- 13 Shining Examples of BuddyPress in the Wild