Paying for proton with cash

I think Proton is anti-anonymity. They are hostile toward Monero and lack transparency with the ways that their products can deanonymize their users. Just because cash can be used anonymously, I don’t think that Proton would accept it if there weren’t other options or it wouldn’t look very bad for a privacy company to not accept private payments. Accepting cash without more convenient anonymous payment methods is a strong indication from them to not try to use their services anonymously.