I’ve been reading through Signal’s government requests and couldn’t find a similar section on Mullvad’s website. I’d be curious to read about them if there are any. It would seem unlikely to me that Mullvad has never received any kind of court order for information about a user.
Anonimity is keeping your identity private, but not your actions.
Privacy is keeping your actions hidden, but not your identity.
Using a VPN will hide your IP and make you more anonymous online. Using a personal CC to buy the vpn does not compromise that and does not defeat the purpose at all.
Only if your specific account ID is compromised could the personal CC be used against you by identifying you. E.g.: “they” found your bad email in an inbox of somebody who is less privacy conscious and are trying to figure out who
festybear69@...is.It depends on what your use-case/threat model is.