This is the unspoken lie about the supposed trade imbalancr. America has a deficit with many countries when it comes to goods but has a massive surplus with nearly every country on services.
Think app stores, streaming services and financial services as you've come across. America got there first and so American companies profit off of these in perpetuity. Unless you're like China and have a domestic version of all such services. Which the world may need to move to if the US is no longer seen as a reliable partner.
They must enter a unique switch serial number (that corresponds with inventory) to make the purchase? Don't see why it has to be contigent on a subscription.