Solved

College is insanely expensive, I've had a recent epiphany, I now know why this is.

Colleges send letters and letters to high school students. I'm a junior and not amazingly smart but I'm at the upper end of the scale, and I've gotten at least 20 letters from random colleges I've never even heard of. Who is paying for all of this postage? College students are paying for this with their sky high tuition's.