They would be profitable in an instant if they'd get rid of half their employees? Im not sure why they need SO many people for Twitter. I believe they have over 4000, they could easily get by with 1000
Suppose they cut back to just keeping the lights on in engineering, along with obviously-profitable sales staff to sell advertisements and make business deals. Twitter is instantly profitable, but the net present value of those cash flows is something like a third to a tenth of their current valuation.
This is what happens when you over-fund a business at too high of a valuation. They do what they can to try to "grow into" the valuation, because otherwise management's junior equity positions and stock options are worthless.