Humans are not able to maintain a stable social network with >250 people
https://en.m.wikipedia.org/wiki/Dunbar’s_number
“Dunbar’s number ... was first proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size. By using the average human brain size and extrapolating from the results of primates, he proposed that humans can only comfortably maintain 150 stable relationships.”
Sounds like nonsense to me. The limitation is more likely to be available time for socializing.