Also another thing is when Github changed its licensing model it really hurt those of us working on small budgets like at non-profits or in education.
https://venturebeat.com/2016/05/11/github-changes-pricing-un...
For example, I worked at a public university where we had student workers. I could convince our dean to pay per repo but once it was per user we had to migrate off Github because we couldn't afford it. Migrating off took up a lot of my time.