PLACEHOLDER METAMETA
Answer: A NEW OUTLOOK
Farid Khuri-Makdisi, Liam Thomas, Eric Wei

The puzzle just tells us to submit an answer to finish the hunt, but upon submitting that, it gives a number and a new answer to submit. This occurs 17 times in total, before cycling back to the first answer.
Each of the 17 words here can be linked (sometimes punnily) to one of the 17 feeder answers. We index the given numbers into the feeders:

Clue Answer Index Letter
CUSTOM MADE ANSWER PHRASE TAILOR 2 A
MONTE CARLO SIMULATION MONACO 3 N
LONG OWL BENJAMIN TALLMADGE 2 E
WINDOW'S VISTA SCENIC VIEW 10 W
VIRGIN'S CLAIM IMPURE 2 M
BRAILLE MEDIUM EMBOSSING 6 S
PLEASE REFRAIN CHORUS 3 O
GUN RANGE RIFLE SCOPE 3 F
WALES VS NEW ZEALAND MATCH OF THE CENTURY 7 F
BIRDLAND PIGEON ROOSTS 2 I
KRUSTY'S BOUNCER CORPORAL PUNISHMENT 1 C
SUPREME CANDIDATE VERMIN 2 E
THE THREE C'S THREE HUNDRED 5 E
FRENCH WALRUS MORSE CODE 1 M
KNOT THEORY TANGLED EARBUDS 9 A
VARIABLE INITIALIZATION INTONE 1 I
HELIUM KING NOBLE GASES 4 L

This spells A NEW MS OFFICE EMAIL. The email client for Microsoft Office is Outlook, so the answer is A NEW OUTLOOK.