Be careful trying any kind of lessons from Github. I admire them greatly but they are an (almost-) unique company because every single person who works there also uses their product 8 hours a day.

This is so profound that when Github they face a significantly smaller set of scaling challenges. By definition everyone there is a expert user of the product and will have a complex and valid view of what's lacking and what can be improved.

I'm glad they are utilizing this gift to the fullest and experiment with new ways of doing things. They can significantly contribute to the global brainstorming effort of how to build a better kind of company. But be careful deriving lessons verbatim. If you want to apply lessons from github to your own company you will first have to figure out how you can get everyone in your company to do everything ( writing, reporting, identity management, coding, designing, ... ) through the same product that you are trying to sell.