I honestly doubt there is any transparent method to the madness. Nothing we're going to be able to perceive from the outside, anyway, with GMAT Club as a limited sample size.
For example, I have a high GMAT score, am a very non-traditional applicant, live in NYC, am female, have visited Columbia a couple of times, and attended prestigious undergrad. I even applied a couple of days early and went "Under Review" on 1/8. Any of those things, you might conjecture,
could kick me to the front of the queue or into a certain bucket or however you want to phrase it. Fact is, I haven't heard a peep in weeks. So maybe that's it -- I'm not getting in at all, they've already made up their minds, they just want to torture me a while longer. Or maybe I am not thinking creatively enough and there is some other method of differentiation. Or maybe they've read my app and are arguing about it; or maybe they tossed it in the loo; or maybe someone spilled coffee on it and they have to reprint; or maybe they found out about that time I pocketed a scented bath bead from Pier 1 Imports when I was six; or maybe (probably!) there are already too many scifi nerds at Columbia and they just don't need another one; or maybe; or maybe; or maybe.
As long as it is fun to conjecture, carry on. But as soon as you start to find yourself freaking out, remember: this ish is crazy. There may be no rhyme or reason. There is a definite date by which we will all know. Until then: we wait.
Be easy.