You cannot view your funding sources, and its primary, from your account: however, you can see them when you make a transaction. The default primary can only be a bank or PayPal Buyer Credit (like mine.) It is possible that if you have PayPal Credit Card, it may be used as default primary (not sure.) You may want to apply for Buyer Credit and use it as default primary funding source instead of your own CC. - Belrion
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