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Disney hack leads to 1.2TB of Slack communications leaked online
(stackdiary.com)
This is a most excellent place for technology news and articles.
Your logic isn't making sense.
The code would end up somewhere for others to use...? What?
One-off products or beta offerings are often kept private, sometimes indefinitely.
In this case, Disney is using Slack Cloud-hosted for internal communication, but I can definitely understand people interpreting it differently.