Once they the education.github.com thing with a proper campaign and starter pack, they received way too many applications than they could handle.

It took them a long while to sort through the backlog, and its always increasing. My education plan was renewed just a few months before I graduated and I'd applied for it almost 8 months back, I think.

Aha, that could be the cause. Once I graduated a few months later I lost access to the student email, so I suppose that's why I never heard back.