I doubt this is a productivity issue or an infrastructure issue - shutting off write access is a major business and reputational loss, and I can easily see cultural factors pushing people not to take that step.
This is possibly a blessing in disguise. Obama and Biden's accounts have been hacked as well so this basically just burned Twitter as an international political platform.
Following that thought, it is entirely possible the whole point of the hack is to discredit Twitter and the bitcoin bit is just smoke.