We can make up to 50 accounts with domains.live.com. But I am wondering if I turn on Open Membership if that will eat up my 50 or does those sign ups not count as part of the 50

Every thing that comes up in the search asking this gets replies as "We changed your account limit" but does not answer the simple question of does it count as part of the 50 or not?

I want this answer before I turn it on or not.