@cwebber @mray

The example given in this tutorial is of a private message. Which raises a question: if A is following B and B makes a _public_ post, will A be pulling it from B's outbox or will B be pushing it to A's inbox?

If B has a million followers, push would be very expensive for B's server. And if A needs to pull the feeds of everyone s/he follows, it's again expensive and wasteful and likely high-latency.