In order to seed/share files on bittorrent, other users need to be able to connect to you. Port forwarding allows your computer to receive incoming connections through a router/VPN (since your IP isn't publicly known or reachable). Some VPNs don't do this and it means at best you'll only be able to download. I don't recall spending extra or enabling anything extra with Nord though. Maybe their policy or pricing has changed though.
In order to seed/share files on bittorrent, other users need to be able to connect to you. Port forwarding allows your computer to receive incoming connections through a router/VPN (since your IP isn't publicly known or reachable). Some VPNs don't do this and it means at best you'll only be able to download. I don't recall spending extra or enabling anything extra with Nord though. Maybe their policy or pricing has changed though.