It's not just a distro. RedHat used to host quite a bit of free software projects. The mailing lists that used to be now just bounce. Sourceware has been abandoned for GitLab. But I'm not sure if everything else has succesfully migrated away. It would've meant something really good if IBM would just continue to provide services for free software, but I'm not seeing them do that so I guess that means pretty much the exact opposite.