I can only say, anecdotally, what happened for both my waitlists, I called and customer service *coincidentally* said my waitlist was coming through at that VERY second. I find it very hard to believe two random times coincided with the waitlist. I'm thinking stalking the site and you doing it on your own is faster/more likely to work and it's a happy accident if "someone" happens to pay attention to the waitlists and inputs the changes necessary to make it happen.