That doesn't tell you much - it's not unrelated to their official work, it's just not related to company priorities. If it's a project you work on at / for work

That doesn't tell you much - it's not unrelated to their official work, it's just not related to company priorities. If it's a project you work on at / for work, copyright is likely still owned by the employer. See also the number of personal projects that are not official Google projects at https://github.com/google https://github.com/google .