My understanding was also that if you are annoying*, you will hurt your chances. That said, you are annoying only if you:
-come to campus especially to beg the adcoms , requesting an interview as if they were the ones able to make the decision alone.
-call every two weeks to ask for updates. bonus points if you call during late afternoon and force them to stay later than they had planned…
-send every week uninformative updates, stuffing their mailboxes.
On the contrary, I don’t think that sending an update in the next weeks, which is now more than two months after the wait-list announcement, can be seen as annoying, if of course you have something to add. I know I would have : the applications essays were so short that I left aside some interesting stuff, and I bet it is your case too!
Let’s see: Friday the 24th, people in R2 will have their final decision. The accepted will have to pay at the end of March. The 2nd of March, the people taken out of the waitlist will accept or refuse their offer by paying €€€€. So during March there will be plenty of uncertainty: R2 accepted might refuse, R1 waitlisted and accepted might have refused too. So at the end of March/beginning of April, some R1 waitlisted and R2 waitlisted are bound to be called. Long story short, if you have some interesting stuff to show, it can be worthwhile to send before the beginning of April.
Then, R3 submit their application the 21th of March, and get their interview invites one month later. Since the R3 batch may lack some interesting characteristics, R1 waitlisted and R2 waitlisted should contribute also end of April/beginning of May.
(*our annoying level in France can be strange, personally I can’t help feeling bothered when a person calls me at 12h31, as I am a about to go down for lunch. Food time=holy, people!
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