As pointed out earlier in this thread, staff jumping ship has been occurring since summertime when Elon decided to harm the very business he's contractually obligated to purchase. SF "liberal" types just don't want to work for this kind of guy.
Fear not though. As Musk transferred Tesla white collar workers into the service dept. earlier this year, he could always figure out some way of loaning Tesla engineers to TWTR to keep the lights on.
As far as the business is concerned, obviously there are "head winds" at a macro level, and even more so for big tech & digital ads in particular. Even beside that, if you look at Twitter's financials, they have not been strong at net profit or FCF since the pandemic. It's obviously a highly popular and useful (news publishing) service, but it's never had a strong business model behind it. IMO a likely end game is Musk fucks around for a while as chairman and sells the company at a large loss in a few years.
Greenman thinking gross profit is something like net profit tells you all you need to know about his analysis.