had to add some backdoors for an investigation warrant, so they could monitor a person involved in a blackmail case
do you know where i can read up on this?
edit: i read about it. it seems it is not an encryption backdoor but rather that they are intercepting new emails for one user before they get to the mailbox (because the emails in the mailbox are encrypted). here is a hackernews thread on it
i would say it is a step forward but how much depends on your use case. if you are encrypting all your emails, protonmail allows you to do so with the body of the email (but NOT the headers). there are other providers who make this as easy. tutanota even encrypts your entire email, subjects and senders included but they recently had to comply with a court order to store new incoming emails for a certain user unencrypted.
when it comes down to it, any secure communication should not be done over email. you can always encrypt the body of the message yourself but the sender/receiver information and subject line will not be encrypted.
an alternative vpn would possibly be mullvad. the people over at privacytools also recommend ivpn so that's another one you could look into