I'm sure you can take a guess as to what Twitter employees do, what with the ad platform, firehouse access, APIs, infrastructure, frontends, celebrity managemen

I'm sure you can take a guess as to what Twitter employees do, what with the ad platform, firehouse access, APIs, infrastructure, frontends, celebrity management, support, and then the fact that it's a giant company, so HR, marketing, sales, finance... I mean, it's obvious. And WA isn't necessarily a replicable model for all companies.