You can easily add them by following the instructions on their site.
On immutable fedora it can be done via
curl -o - https://repository.mullvad.net/rpm/stable/mullvad.repo | sudo tee /etc/yum.repos.d/mullvad.repo
rpm-ostree uninstall mullvad-vpn --install mullvad-vpn
# after reboot, if not working
sudo systemctl start mullvad-daemon
Yes that is so sad. No torrenting anymore just leeching. Sucks. But understandable, how do other VPS providers handle that?
Idk for the how but airvpn does for comparable prices. This coming from a fellow multi-tb Linux iso torrenter. Also I assume you mean VPN unless mullvad does VPS stuff I don’t know of.
Does your network not support UPnP? You shouldn’t normally need to port forward in order to seed a torrent, unless your network prevents NAT traversal.