An example from a while back is the talk where a Dropbox engineer talks about going from 2000 to 200 million users ( http://mashable.com/2013/07/30/dropbox-scaling/ )
Although this article is more about technologies, I'm also interested in overall business development that goes along with scaling a company.
For example, let's take a startup with 6 figures in revenues, what should a small team focus on in order to be successful?