Letting 80% go seems to have worked for X.
They've 'caught on fire' many times, such as the time login/2fa broke, or the weeks/months where you were rate-limited to only a few hundred interactions per day.
It was Musk's actions.
(I hope I didn't give Elon Musk a bad idea concerning how to pitch his agenda to advertisers ;-) ).
It could survive for years in maintenance mode as long as people continue using it.