Just with respect to some details: Spotify changed from being a self-supporting (free) user of Cloudera's open source platform to being a paid support customer

Just with respect to some details: Spotify changed from being a self-supporting (free) user of Cloudera's open source platform to being a paid support customer of Hortonworks. So, it was never actually a Cloudera customer (despite what was widely "reported"). Disclaimer: Cloudera emp here.