I bet the reason Trump didn't get hacked was because he is special-cased in the Twitter system to avoid insider vandalism which protected his account from this insider attack.
I believe you are right, a rogue Twitter employee had previously[1] deleted Trump's account. So there must have been some special protection to prevent it from happening again.
Agreed, it could be as simple as someone at Twitter calling someone in the White House every time someone logs into the account. (The White House has a ton of staff, I met some of their IT people at a conference back in the day.)
Get admin access from unlocked phones, make a bitcoin wallet, use admin access to send tweets with double-your-bitcoin tweet. Start thinking up accounts you think would work well for it and start going through them one by one.
"...from the accounts of Gemini, Binance, KuCoin, Coinbase, Litecoin's Charlie Lee, Tron's Justin Sun, Bitcoin, Bitfinex, Ripple, Cash App, Elon Musk, Uber, Apple, Kanye West, Jeff Bezos, Michael Bloomberg, Warren Buffett, Barack Obama and CoinDesk."