We are assuming:
1. All people report an interview invite here
2. GMAT club is as popular as it was last year. More people have not started to use clear admit instead.
Realistically, I think most people have received their invites already. I would assume Booth to spread out their work equally through out the week, rather than wait for the one last day to send all the invites. It does not make sense. If anything, only a select few invites are pending.