about BC and Bryn Mawr aid..

Does Boston College and Bryn Mawr give scholarship by need or by your grade??
I got 27,000 scholarship from BC and 28,000 grant from Bryn Mawr…plus work-study plus loan adds up to quite a lot…
I was wondering if my family has to continue to be “poor” for me to get that much grant or if I get a good grade at boston college then the college will give me a lot of grant…??