Wow. Very interesting. What is the acceptance deadline? May 1?When the puzzle is almost done, and just a few pieces are missing, Admissions even more carefully manages outstanding offers to accepted. When the acceotance deadline comes, they may offer some number (unknown) a place on a waitlist, to which they would offer the last few/unknown number of places in the class, which perhaps open up when someone changes their mind and declines after accepting, breaks a leg, whose medical does not clear satisfactorily, gets themselves arrested, etc. It is unknown how many will come off the waitlist - none, a few, some, many, a lot.
There will always be more stellar fully qualified candidates with noms than there are seats in the class.
Then those places on the waitlist would likely be given those few remaining slots.