also when you need to develop a new feature and it needs to go through A:B testing frameworks, localization (including Arabic Right to Left text/layouts), phased feature roll outs, 99.999% reliability, integration testing, planning for use cases anywhere from LTE/WI-FI in USA to EDGE network in developing countries, and you need to build the tools that do those things too. Clearly the 100 engineers are sitting there twiddling their thumbs.
I think you might of missed the point... everyone has regulations and current problems at any scale, but the ability of BS job roles to hide in a large workforce and for managers to build pyramidal layers of organizations of little added value (but lots of expensive management layers with ever loftier titles).
Yeah, when a team goes from 2 to 100, a serious business/engineering manager got to ask a few questions. However, if money honey flow is not a problem, it could be in everyone's interest just to ride along