I use proton. I pay with Bitcoin. You can't pay with lighting yet tho. Do they have a vote for new features voting system? I've never seen it before.

I don't like email because there is too much spam. I told them they should require to pay 2 Satoshi to send an email. The email receiver gets the 1 Satoshi and proton gets 1 Satoshi. On a global scale they would make money and the email receiver makes money. It would completely destroy spam and scammers.