are subdomains part of a single web site or separate sites?

How are subdomains handled? For instance, if I've got example.com, blog1.example.com, and blog2.example.com, is that viewed as 1 web site or 3 from Typekit's perspective?

I understand that a Portfolio plan would not cover something like a wmpu setup with 100's of blogs on subdomains; that's clearly outside the scope of what you intend.

I'm wondering about the individual or business who has a main site and subsites that all basically fall under a single umbrella as they all represent the same entity.

In searching for answers here, it looks like a number of people have asked about this, but I have not found a clear answer.
 
sad I’m confused
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