There's a heuristic of 150 also to be careful of: in general
   (rule of thumb) - organizations can have a flat architecture up
   to around 150 members; beyond that point, it has trouble
   sustaining itself without a hierarchy; and a hierarchy
   (informally) typically begins to form if its not
   institutionalized by the higher organization. I think Rule of
   150 is what you'd look at for that. That's the only real trouble
   I'd see with scaling beyond a certain point. "