As Dave Winer noted, Medium does content categorization upside down: “Instead of adding a category to a post, you add a post to a category.” He means collection in Medium-speak, but you get the idea: Topic triumphs over author. Medium doesn’t want you to read something because of who wrote it; Medium wants you to read something because of what it’s about. And because of the implicit promise that Medium = quality.
Blogging for its relevance to project SAKE, where I am also struggling with finding alternative organizational schemes for contributions from players. A stream metaphor seems wrong. Also, we really want to incentivize quality over quantity (or frequency) of posts. Medium might have gotten a few things right, there.