I didn't bother playing on day two since it was mathematically impossible for someone with 3 out of 4 points to tie for second without sharing it with two other people and I wasn't in the mood to spend another six hours playing chess an hour away to make $122 for splitting third (or worst).
You don´t care about the games? The tournament experience? Are you only interested in the big money in chess?
If he withdraws from a tournament, then his rating is not updated, right?
No, withdrawing just lets the TD know not to pair you in future rounds (that way some guy isn't left with no opponent). The games you played still count towards your rating.
I was confused because I have read some stories about a young Caruana being withdrawn from tournaments "to protect his rating". I don´t know how that would have work.