Did you mean 9 billion clicks or impressions daily? 50 person team to run an adnetwork on tech side only? I am really curious why did it take that many people

Did you mean 9 billion clicks or impressions daily? 50 person team to run an adnetwork on tech side only? I am really curious why did it take that many people before going to Lambdas. We are in the adtech space also and there is a 5 persons team (on-call ops+2 devs) to run our own datacollection, third party data providers, RTB doing half a million QPS and own adservers doing hundreds of millions of impressions daily.