Earlier quoted context omitted.
Yeah they should use privacy pass for the default accounts as well to decouple payment from account.
Absolutely not. I don't feel it's necessary to pay the sacrifices needed for a trustless society. I would much rather be able to have things like personalised searches (which are identifying).
This wouldn't affect your accounts usability or features it would just delink your payment from your account. Same as paying for Mullvad with a giftcard bought on Amazon.
I don't really understand your first paragraph.