If I choose to use an email system that you don't like, you don't have to participate. Participation is non-compulsory. You can refuse to reply to my emails.

If I choose to use an email system that you don't like, you don't have to participate. Participation is non-compulsory. You can refuse to reply to my emails. You can refuse to send to services you don't trust. You can choose to use one payment broker or another.