Answer
You can connect your PayPal account to your Facebook ad account and use it to pay for your ads.
How to Set Up Paypal on Facebook
How to create a Paypal Link for Facebook
Is PayPal connected to Facebook?
You can connect your PayPal account to your Facebook ad account and use it to pay for your ads.
How do I remove my debit card from Facebook?
1. Tap Payment Settings.
2. Tap New Credit or Debit Card to add a payment method to your account.
3. To remove a payment method.
4. Tap the existing payment method
5. Tap Remove Card.