Hack Club, a nonprofit organization, was faced with a significant price increase by Slack, from $5,000/year to $200,000/year, with only a few days' notice. The organization considered this a form of extortion and decided to migrate to Mattermost. After the story went viral, Slack's CEO reached out and offered a better deal. The experience led Hack Club to prioritize owning their data and consider the risks of relying on external SaaS providers.