[M as in the Roman numeral M]
I find that very unlikely!
(but that’s because you made a typo)
[1] https://www.levels.fyi/ [2] https://web.mit.edu/e-club/hadzima/how-much-does-an-employee...
If you do, they would still be massively unprofitable.
Edit: Twitter median employee compensation is $232,626. Assuming they do fire 50% and that's the average of fired employees plus 50% tax and overhead that would come to about $1.3 billion per year. https://www.bloomberg.com/graphics/ceo-pay-ratio/
if you only count tech people, this is too low. If you count all employees, including people paid to review posts or moderate, or handle customer reports etc, it might be too high an estimate.
So if you fired half, which half? If it was the tech employees, i think twitter would save a lot more than your guess, and if it was just the support/moderators, it would not save much money at all imho.