Invitation to local event after being admitted

Do they send out invites ahead of time for admitted students?

We received the invite a few weeks before the event. We received it after my D applied but before she had been accepted. She did get accepted prior to the event but I think there were a lot of people there who hadn’t even applied yet. I think the invite just went to all local students who were on their list.

I think they invite a variety of students off of several mailing lists. Some are HS juniors, others are seniors (including those who’ve already applied and been accepted).