Our Encrypted DNS servers have now been converted to run from RAM!
This is completely cost-free, and available to anyone that wishes to have a trustworthy, audited Encrypted DNS service with optional content blocking!
Read more here: 
Mullvad VPN
Moving our Encrypted DNS servers to run in RAM | Mullvad VPN
We recently announced the completion of our migration to remove all traces of disks in use on our VPN infrastructure.
