Only those who have never posted and were not logging in were removed.
Anyone who has even one post should be ok.
Thanks for your response, CR Backup Admin. As you already appear to be aware, that's not quite how it worked out - I had maybe five or so posts, but my account was deleted.
I'd already re-registered with the same username, so there's nothing to be done about it now; no big deal, those posts were hardly earth-shattering pearls of wisdom. Just please don't delete me again next time
I've relinked your old posts. You had not logged in for 6 months, which is how your ID got removed.
Hopefully there will never be another cleanup like that one.
I did not think they could be recovered after reading up on how to recover a member, but I gave it a try anyway, and it worked