The vast majority of Twitter’s turnover is from ad revenue, but it also makes money from "design, development and support services". Twitter UK saw its pre - tax profit for 2017 drop 4 % year - on - year to £ 2.55 m ( $ 50 m ) , according to its latest financial disclosure . Post - tax profit for last year was £ 150,000 , down 92 % on 2016 . Revenue dropped 2.5 % year - on - year to £ 77.42 m . Meanwhile , a worldwide cost - cutting exercise saw British staff numbers decrease from 187 in 2016 to 174 last year . Twitter 's global revenue dropped to $ 2.44bn over the period , the first fall in the social media company 's 10-year history .
Twitter UK saw its pre - tax profit for 2017 drop 4 % year - on - year to £ 2.55 m ( $ 50 m ) , according to its latest financial disclosure . Post - tax profit for last year was £ 150,000 , down 92 % on 2016 . Revenue dropped 2.5 % year - on - year to £ 77.42 m . Meanwhile , a worldwide cost - cutting exercise saw British staff numbers decrease from 187 in 2016 to 174 last year . Twitter 's global revenue dropped to $ 2.44bn over the period , the first fall in the social media company 's 10-year history .