Why does Brown University send me letters when I know I can't get in?

It's torture... I know colleges automatically send you stuff when you take the PSAT, but I got a low score! Even after I took the SAT a few months ago (I got an incredibly low score-- a 1480!), they still sent me emails and a huge pamphlet. My friend got a higher score than I did and yet she did not receive any letters from the Ivy Leagues. Should I at least try? They're probably just going to laugh at my application. Oh well.