Use on the main blog and the subdomain blogs

I have buddypress setup on my domain, and I have several different subdomain blogs already setup.

Is this theme designed to be used on example.com only, or can it also be used on the sub blogs too (blog1.example.com, blog2.example.com...)

I want there to be one unified look throughout the whole domain name, regardless on which subdomain one is on, and when I tried to use the theme on the sub blogs, it wasn't showing the posts.