I know someone that is high up there. Basically, twitter has struggled to get their ad cost per impression as high as FB or Google. They have ad placement volum

I know someone that is high up there. Basically, twitter has struggled to get their ad cost per impression as high as FB or Google. They have ad placement volume but they are not worth anything due to the fact people are signed out. Google does ok with logged out users since the user is searching for something - and ads can be related to that. To make the real money twitter needs age,sex,geo on every impression. Twitter has learned there isn't much point serving pages where they can't monetize it.