Not too dissapointed about this one because I was frankly surprised that I was pre-approved at all (I was pre-qualified for a Gold back in February but never bit). Also, because it's an SP, no real harm. Checked in on the site, was told I was pre-approved, put in the same income they've had on me since I finished this past year's taxes, bam, instant denial. Kinda strange, but oh well.
The status check page won't load and explain specifically why I was denied - my scores have all been updated as you can see below - though because the school year is starting, I'm wondering if a student loan JUST popped up and maybe spooked Amex? (I did just get an email from my servicer yesterday with login deets)
It would've been nice to get such a great card so early on my credit journey, but considering I lucked out to spend 1k for BOA I think it's for the best I didn't waste the bonus haha.
Back into the garden I go until I can cop that United Explorer 
UPDATE: Called in with the phone system and seems to be that my income was too low, which makes sense - the annual fee is around 4% of my stated income so I guess that was a red flag haha. I technically have made more than last year so far after taxable scholarships and such but am trying to limit my stated income to what I can prove thru returns to avoid issues if I ever get a FR. I'm glad to hear it wasn't an issue with my profile overall - and this probably means that I'd be accepted for a card with a lower or no fee like the Green (which I'd be down for anyways). Maybe next year?