(http://dnickolas.com/img/usavsworld.png)
TLDR: Top 12 scores from each side are added up, and the winners get all the prizes. All of them.
The event runs from 9/9 until 10/10 2022 - Region friendly dates to avoid confusion.
Anyhow, sign up at the following link on cagtournaments. It's costless, and victory is priceless.
https://www.CAGTournaments.com/CANAMVSWORLD