With their endowments (Harvard: $35B and Yale: $22B vs. Duke: $6B), they can kinda afford what they're doing

As more money gets put into the financial aid initiative, Duke will be able to afford to do better. I would imagine that, just as Harvard did this year, Duke will increase the boundaries for different kinds of aid and increase the benefits in each category. Considering where our endowment is, actually, the fact that we are able to compete at all in that rarefied air is fairly impressive.