At this time we only support checking accounts and debit cards at US banks as funding sources.
When you use a Privacy card to purchase something online we automatically debit your checking account. We're hoping to roll out credit card funding, as well as other options, in the not too distant future!
Wait, I don't see debit card / checking account as an option when trying to add a funding source!
Reach out to us at firstname.lastname@example.org and let us know!