What are reccomended ways to maintain privacy during online payments?

Hi all, some quick questions I couldnt find after searching around. These questions apply to non-cash or gift card online payments. **Please note that I am aware of Privacy Cards and am not asking about them.**

* Is the use of a credit any more or less private than a debit card?

* Are there any general methods of reducing privacy problems when opening a new credit card?

* Are any payment services (PayPal, Zelle, Venmo, etc) more private than …

online payments payments privacy