There's a lot of suggestions of what one might accomplish with this exploit, but I'm not sure they would be obviously more lucrative than this. Any time you use it, you're likely to lose it, so its value is pretty precarious. How much can you really accomplish in a few hours?
People get hacked so often on twitter that there's already substantial doubt ("did they get hacked?") whenever somebody tweets something odd, so I really doubt you could accomplish some diabolical geopolitical aim that some seem to expect.
And as if it's so straightforward to find a terrorist billionaire that's willing to pay top dollar to use it to start a war or something to that end.
People have made far more from things Elon has tweeted. Now billions is ridiculous, but you could have made millions via market manipulation. Not to mention the amount of damage had he done a targeted exploit - there would be a ton of speculation as to whether Elon/Trump/Gates was "really" hacked or if it was just a cover.
The Prime Minister of Israel was hacked. What if he'd announced "Dear holy men of our faith, now is the time to immediately strike the black devil threatening our very way of life within the U.S."
Or Barack Obama and Joe Biden's account saying "The jews have finally taken over the White House. Donald Trump has been confirmed to be a planted Russian agent. Act now in the streets before it's too late"
Obviously, those aren't worded very well because I'm tired as shit. But how can you not imagine the implications that could be had? It's not that hard...
I don't think any state actor or 'player' of significance would be stupid enough to do something terrible based on a tweet. It's much more likely that these actors would consider the account hacked and at the very least do a bit of googling to find out.
And when it comes to specifically the kind of message that you use as an example, it's not like they wouldn't wait to see how it unfolds (Twitter saying their accounts were hacked. message void) and see because immediate action wouldn't be necessary.
Hypothetically, I can see some danger if a nuclear power would respond to a tweet saying "we're launching nukes" by launching a pre-emptive strike. But that's fully in the realm of fantasies hysterics have.
If I read that from Obama and Biden I'd immediately smirk and think "They've been hacked!" I mean there would need to be a sit-down interview on CNN before I'd believe that.
Israel... same. They're a sophisticated nation state with Harvard Ph.D.'s helping to lead their foreign policy, and messaging. If they go from diplomacy to sounding like jihadists in 15 minutes, that's a hack.
Anytime the volume or aggression level goes from like 10 to 1,000,000, it's probably a hack.
Given that context, I think tweeting out a BTC address for a giveaway is something that's halfway plausible, as opposed to totally unbelievable.