Why do you follow a person on Github?

DevArt keeps this article discoverable at a fast, self-canonical URL and links clearly to the original DEV publication.

I follow 137 people on Github. I follow some of them because of just my friend. They can be a really good developer but some followings don't push any code to Github for a while. I just worry why we follow a person on Github? What are your reasons? Why should we follow a person who hasn't any activities on Github?

being your friend
being your colleague
being a really good developer
being a good open source develop
being a famous guy like a big tech company CTO or etc
...

The other point, I can ask, why do you push the unfollow button? That can be the second question. Actually, two questions are related to each other.

Cheers.