Generally I've been looking at the number of subscribed to o/GenderCritical or Women's Liberation, but that's inaccurate considering many might unsubscribe from those circles. So it'd be cool to have that number on the main page somewhere. Maybe even in addition to how many new users registered on whatever the given day is (this can allow users to pay attention to whether there's an uptick of registered users on one day). I'm not sure how this would work out with timezones but it'd be cool!