Comment by Hamuko

That specifies "an account that has an active subscription" and they only seem to be using the term "subscription" in the ToS for auto-renewing plans.

>If you wish to subscribe to the service, you can sign up for a PayPal subscription. With a subscription, €5 is automatically deducted from your PayPal account each month.

Otherwise they just talk about "using" or "paying". It has also been absolutely possible to a) add new port forwards if you have paid for Mullvad b) pay for Mullvad when you have port forwards, so those ToS wouldn't make sense if they referred to all Mullvad accounts.