[corford]

Distilled down: fast execution with small tight dev teams, ruthless focus on adding direct user value/utility to every new feature (and choosing insightful metrics to validate this), management keeping their greed in check and an overriding culture/philosophy that good product is driven from understanding and respecting your users (don't waste their time, do value their attention, don't overcomplicate, don't needlessly monetise). Oh and incredible discipline and inventiveness in devising viral growth loops that don't break these rules.

Nice & inspiring.