We don't know if it is losing money. It's a private company.
He reduced the headcount to roughly what it was in 2017. At the time of the acquisition, many of the employees were in non technical roles, contributing nothing of value, posting videos about their empty work day on TikTok. Jack Dorsey admitted that he made a mistake by over hiring - more than doubled the headcount from 2017 to 2021.
https://www.statista.com/statistics/272140/employees-of-twit...
We know the value as perceived by investors has dropped. We know usage and revenue has dropped. There are now several competitors in the same space, some fairly successful.