When you sell such a sensitive product, which could be used for example by swiss account tax evasion whistle blowers, maybe you should disclose on the front page that you can be compelled to log IP addresses and advice users to plan around that.
> In addition to the items listed in our privacy policy, in extreme criminal cases, ProtonMail may also be obligated to monitor the IP addresses which are being used to access the ProtonMail accounts which are engaged in criminal activities. Under no circumstances will ProtonMail be able to provide the contents of end-to-end encrypted messages sent on ProtonMail.
To be fair, I don't know if this provision was added after they had reported the instance in their transparency report.
However, I think at some point the customer should use a bit of common sense. Anyone who believes that a government may compel a company to start IP-logging their mail should be considering that in their threat model when they are looking for an e-mail provider. I don't think it needs to be plastered on the front page - especially not with advice on how to circumvent government authorities lawful requests.