Anyone around the world can purchase Packages, but in order to be a Creator and get paid, you must have a US bank account linked. If you're outside of the US, you can use Transferwise by going to https://transferwise.com/borderless?source=tinysponsor
If you'd like to know more about Transferwise before signing up, you can read up on it here: https://techcrunch.com/2017/05/22/borderless-banking/