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Well, I would (and we have) certainly include a social graph into the design. It's how you deal with sybil/spam/noise inherently (WoT).
Whether to call it "follow" or connect or such matters less when you can also semantically tag your contacts as a another dimension for grouping a filtering URLs.
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Interesting. Does it make sense to entirely remove the "Follow" button with a design like this? Or does it still serve a purpose on platforms designed for specialization?