It's probably because it has 10 million registered users. When you compare that to something like Instagram, Twitter, or even mobile apps like WhatsApp; it's n

It's probably because it has 10 million registered users. When you compare that to something like Instagram, Twitter, or even mobile apps like WhatsApp; it's not a huge user base. That being said, I like GitHubs business model a lot more because their product actually provides me with a lot of value.