This is a puzzle. Now that Facebook has subscribing, it makes a lot more sense to me. I feel like it's about to become meaningful. 

And I think the people I share friendships with on Facebook just became more valuable to me, and me to them.  

But now I really want to get my Blork feed to flow through there. 

I'm scratching my head over their API. I'm sure it'll start making sense real soon now.  

Interesting puzzle!  

Update: They use OAuth 2.0.