Or they architect their system better so that they never collect the IP addresses to begin with. I think Privacy Pass and other things Mullvad is doing help in this area, but I am not aware of Proton working with them to implement anything like this. But Proton should do this, because it’s relevant to customers of Proton.

https://discuss.privacyguides.net/t/privacy-pass-the-new-pro...

Apparently not Privacy Pass related, will keep looking as I seem to remember that Mullvad was doing that implementation, but I may remember incorrectly.

https://discuss.privacyguides.net/t/mullvad-has-partnered-wi...