Elon basically started with the Private Equity leveraged buyout playbook - borrow money to buy a business, then assign that business the debt used to buy it.
But it’s unclear how he’s going to do part 2, which is to either suck enough value out of it to recoup the purchase price before it fails completely, or turn it around and make it more valuable than when he bought it.
Right now Twitter needs to drastically increase its revenue and decrease its expenses just to service the new debt load. Hence Elon firing everyone and trying to charge more for every little thing.
It’s amazing that Twitter was more or less self-sustaining prior to this, and now it’s not.