I've been using GitLab for almost 4 years now, largely for reasons stated in https://www.jvt.me/posts/2017/03/25/why-you-should-use-gitlab/ but also for all the extra stuff they've built on top over the years.
Originally it was just because of private repos, but evolved into a love of the platform being built in a way that folks can contribute, unlike GitHub.
by 
Jamie Tanna
.