I have no idea why this functionality was never documented, but one thing sys-tweak can do, is bypass games' requirements for a linked Nintendo account, without having to link a real or fake Nintendo account.
This is useful because 1: why link an account if you don't need one? and 2: Nintendo...
Ah, yes, portrait mode, surely the best way to film a row of people. If only there were some way to fit a wider shot, at the expense of height... if only...