Ok, so, I came upon a thread where someone was in a bundle and trying to work out payment details. What I found out is that, if you're in a bundle, itchio has to do the paying. It was mentioned that they can pay to a Paypal account, but it still has to be itchio that pays you. Here's the thread if you want to take a look at it.
https://itch.io/t/1175661/collecting-revenue-from-a-bundle-please-help