How writing ninety nine words in a one hundred word challenge could make a massive difference. As you know a one hundred word challenge isn’t much words but if you write ninety nine words and you cant think of one more every thing can go wrong. You might have to start all over again.
If you have to start all over again then you have to think of a completely different subject which could take long time so that’s why you have to think of something small and it also makes sense. This is why writing ninety-nine words is big.