The REAL reason Slack became a billion dollar company
medium.com/@satyavh/the-real-reason-slack-became-a-billion-dollar-company-f14c22b15a29?goal=0_de7676a4fb-9e65797738-420051901
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
And why its business model is evilly brilliant and Twitter is going nowhere