There was this thing where a court forced them to log the IP and recipients mail addresses of a Prortonmail user, which was used as evidence against them in a legal process.

They released a statement that they do not collect this data unless a court orders them to, that they can't and won't collect the content of mails, which is within the law apparently, and that the law cannot force them to collect data from their VPN. They also removed the promise to never collect any data from their sites and documents, because they felt it was not appropriate under the legal circumstances.

If you want to hear my opinion about it: I give them credit for handling this transparently, explaining exactly what happened and removing a false claim from their marketing voluntarily. I do also agree that they should have never misled people into thinking Protonmail is an anonymous way of communication.

As the data collection is very limited and has to be ordered by a Swiss court, I do not feel threatened and continue to use their services.

Frankly, I think if you're actually fearing to be persecuted for something and don't want people to figure out who you talked to, you shouldn't use mails to begin with. And if you do, at least use a VPN or Tor. That's how they got the user, because they didn't and law enforcement figured out they use Protonmail + their IP with the help of the ISP.