We are cleaning out spammer accounts, 99.9% of them are inactive, but occasionally come to life.
Some members who signed up over 45 days ago but never logged in again may get caught up. The account can be recreated, nothing is lost, since nothing was posted and no one logged in. We had robots signing up thousands of new accounts each day, and intend to remove as many as possible.
As long as you log in once a month, or if you have at least one post, you will not be affected.
This will be happening slowly over several weeks.