Another related problem is that FB won't let you remove all credit cards from your FB account once you've added one and/or run ads--at least not through the sit

Another related problem is that FB won't let you remove all credit cards from your FB account once you've added one and/or run ads--at least not through the site. I have yet to try contacting them. I can see this logic if you have recently run ads that must settle, but even after months or years of inactivity, a card must stay on your account.