<p>I am certain that their experience shows that if you are the kind of person who responds to their postcards, you are the kind of person on whom it is worthwhile to spend some marketing dollars. Chicago will definitely demonstrate some interest back to students who demonstrate interest in Chicago. In my experience, Chicago does a very good job of devising strategies that let it target its marketing to the students who are most likely to be receptive.</p>
<p>As to whether it affects admissions: Merely the fact that you demonstrated interest is unlikely to have any impact. Chicago does so little to boost its yield generally that it is hard to believe it uses this particular yield-boosting tool. However, I imagine that they do keep whatever responses you gave to the postcards in your file, and I also imagine that if you wind up on the bubble they can only help you.</p>