CCP believes on Dunbar's number

cosy

I'm sure you'll probably ask why they aren't all working on EVE. We have tried and the diminishing returns are staggering and we believe in Dunbar's number. This is the reason why we have compartmentalized core technology and game teams into scrum teams, to counter that.

kinda a bit late to mention this detail

http://en.wikipedia.org/wiki/Dunbar's_number in short say that a human can maintain social relations whit ~150 ppl and know the relation status between the group so on business any team above that number require allot of management and a military structure which can be less productive

one of the company that move their business model around this number is http://en.wikipedia.org/wiki/W._L._Gore_and_Associates