Can’t speak for their other products but Bitbucket had free private repos first.
Now that I have a bunch of personal projects there, there’s no reason to switch. In 10 years the service was only down a couple of times. And I like the Web UI - I don’t think GitHub’s Web UI is any better.
So my experience using Bitbucket hasn’t been like living under the CCP. Maybe if I tried Jira I’d think differently?