Don't know where do you get that understanding from. Google's current market cap is 112B, its total revenue (2008) is 21B. It used to be that price/sale ratio i

Don't know where do you get that understanding from. Google's current market cap is 112B, its total revenue (2008) is 21B. It used to be that price/sale ratio is 10 for startups, which means they need 25M revenue to be valued at 250M. Even if P/S is massively compressed these days, they still only need about 50M to worth that valuation. 50M sale for twitter given the usage is definitely feasible.