College students are notoriously thrifty. At any given time they might have less than a hundred dollars in their bank account, so 29 dollars is a third of thei

College students are notoriously thrifty. At any given time they might have less than a hundred dollars in their bank account, so 29 dollars is a third of their net worth. By spending 29 dollars up front they lose a lot of their liquidity. Yes, they study at a Sheetz and buy a $3 coffee each time, but I doubt they study every night, in fact I would suspect that those who do that only do it a few times a month before a big test or something.