It was GDPR and data privacy that wrangled the megacorp I know to kill all channels and workspaces that seemed affiliated with megacorp with help from Legal...

It was GDPR and data privacy that wrangled the megacorp I know to kill all channels and workspaces that seemed affiliated with megacorp with help from Legal... until then everyone was making and using slacks free tier. It's still used to communicate with people outside megacorps SSO environment. Most users don't know nor care about the paid tier, especially if CHQ isn't footing the bill and the cost for each user license is passed to a business unit or department (which can be how megacorps are setup). The change over was funded by corporate and it's becoming the standard form of comms in the enterprise.