Per @kodo's discussion with Gargron, a person's posts only make it to the federated timeline if someone on your instance is following that person. IMO this is a design flaw — it encourages centralization on one big instance (so that you can see entire conversations and find new people easily) even more than it encourages cross-instance links.
@sonya @kodo there's no easy fix for that - traffic grows exponentially with number of users and instances, if all federated with all by default, it would be unmanageable. That's where p2p networks are better - but also so much harder to do (look at #Twister ) #KeepCalmAndFederate
@rysiek I do like your hashtag a lot