Money for nothing (sort of)
Why do people spend more to get free things – in this case, a mostly-syrup-and-ice slushy drink that has no nutritional value? What, precisely, is so alluring about freebies?
From the story:
“Free is magic,” says Barry Schwartz, professor of psychology at Swarthmore College. “If you offer something for free, people will gladly spend money to get it.”