Today I stumbled upon an interesting topic of culture in Spotify. Henrik Kniberg is main person who provided the insights to it.
It's all started in 2012 when Henrik wrote about it in Scaling Agile @ Spotify with Tribes, Squads, Chapters & Guilds. The organisation grew and changed since then, but I think it's valuable to see how the organisation evolved.
In 2014 two videos (one, two) were released providing a sweet short summary. I highly recommend them to watch.
Such a strong content and great delivery backed by successful company grew the popularity like a wild fire. There is an interesting post about the wrong adoption of the ideas. See There Is No Spotify Model for Scaling Agile