Its quite simple: don't use Slack. Its a walled garden and there will always be incidents like this for as long as people don't appreciate that these companies

Its quite simple: don't use Slack. Its a walled garden and there will always be incidents like this for as long as people don't appreciate that these companies don't have any commitment to you, for as long as you are just using their services for free. Use IRC. Its not nearly as walled off.