<p>I might be able to help with this one, actually.</p>
<p>The cross-admit numbers are determined after acceptance – they send a survey to accepted students asking where else they applied, and whether they were accepted/waitlisted/rejected from those places. This data is used to calculate cross-admit numbers and percentage of students who choose one school over another.</p>
<p>So MIT doesn’t know where else you’ve applied until after you’ve already been accepted.</p>