Also, don’t leave your account unused, delete it. User and follower numbers count.
And least as important, reply (if necessary to another corporate mail address) every email with Twitter/X in the footer, with a kind request to stop promoting and facilitating X.
Granted, if you have a sizable following there, you could try to get them to make Mastodon/Bluesky/… accounts to follow you off the platform first.
Of course, you should have done that years ago, but better late than never.
But if you have less than … idk, 100 to 1000 followers? You should just switch.
Much better Mastodon than Bluesky.
True, but both are much better than Twitter at the moment.