The number was reset after the migration. About a year ago, there were several hundred online at once. In fact, looking over the database, we have thousands of people who joined in 2005 who have not been back and so an email was sent to them - inviting them back. Hopefully they did not see the email as spam. At least there are 200 or so active witches and wizards.
Maybe people who signed up, never posted, and have not been back should be deleted?