They need to first move out their official’s accounts out of twitter If they really want to lead by example, there is Threads and mastodon and what not!
Seeing how Facebook and Instagram have been shutting down posts about Israeli atrocities in Gaza. and deleting Palestinian Journalists accounts, Such moves to try and police what is fake news and what isn’t by governments according to their own interests and biases is an attack on free speech and freedom of the press.
Thierry breton himself does’t post on mastodon, If my memory is right he had an account on mastodon but doesn’t post there! celebrities need and audience that’s why they are hooked to Twitter and are trying to shape it to their liking.