And just because it makes $2B/yr vs $4b/yr or whatever doesn't mean it cant sustain as a business indefinitely. The bulk of the critique of Twitter these days is whether Musk can make a profit on $40B as if that's what will determine Twitter's survival long term.
Musk losing billions of dollars in the short term is a private loss for bankers and his own vast ever growing wealth. It's not exactly something that kills a business in the timeline people are hoping for. If anything there's probably a long line of B-tier investors willing to prop it up long enough for the dividends to pay off.
Far shittier companies have survived for much longer on much less.