No invite. Here is my profile.
Latin America, top 10% of my engineering class in a top 3 university (don't know what that would mean in GPA), GMAT 740, CFA, mid size partner in an independent investment management company, head of my investment division.
Everybody is rationalizing about the invitation process, so here is mine.
They definitively have a reason for releasing invites in 3 different dates.
I think they first chose the 600 people they were sure they wanted to interview. Also, they probably discarded a number of candidates (say 2.700) that they were sure they did not want to interview.
The adcom probably use the additional time to debate and chose among the “maybe” candidates.
Who knows, maybe it is just like they said. Maybe they have already chosen and it is a random release process.
Anyway, if you ever had a shot than you still have a chance. Good luck to all!