@Abisha1980 As back up when using PayPal balance (or bank account), that's why. And some shops also want to set up billing agreement in your PayPal account to streamline future checkout experience so they ask for a credit card for back up if not enough in your PayPal balance/autopay/faster checkout. If you can't or won't add a card, then you won't be able to complete checkout. You use PayPal to receive money.
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