Is there enough demand in the San Francisco area to absorb say 20% of Twitter employees? It always feels like everyone is hiring out there.
This is probably a very wise move. 4000 employees is just insane for what they do. Grow wisely.
Yes and no. Twitter will make ~$2 Billion in revenue this year (and it's their massive revenue growth that's kept the stock price where it's at). That takes a LOT of sales and marketing people to achieve.