I didn’t even reply to NEU email because it was irrelevant to me. Besides, the email gave instructions to go to the portal and click withdraw if you’re no longer interested, so I just didn’t do anything. Maybe it has to do with acceptance rates. NEU is known for caring about ranking a lot so with a lower yield they have to accept more students thus raising the acceptance rate which affects the ranking. Just a thought I had when I was reading an article someone posted on CC.