Also, donโt 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.
I'd argue putting it into people's field of view could sway an individual, and if one person can be moved, more could follow.
That side already proved that boycotting works, in their disgust of a trans-indivual advertising beer, and certain groups being mortally offended that folk could suggest BDS actions towards Israel.