I’m not sure an MVNO will accept a gift card (I was thinking Tello).
Of course, I’d have to also then have an anonymized address to which they could send the sim card.
And I don’t mean to conflate “security” with “privacy”, but I can’t help associate them together (a pathway to building a dossier on every human is governments paying these companies for the information they’ve hoovered…until we can get Western Civilization back to its God-gives-us-unalienable-rights-and-governments-are-instituted-among-men-to-protect-those-rights, every little assertion of agency has to be taken.)
I’m not saying we can go back to the early days of the internet where privacy was a needle-in-the-haystack issue, but I also don’t want to knowingly march like a cow to the meatpacker.