It does? That explains why in the video the person was able to play incomplete dumps after some tweaking. I know that on their website they recommend you create a full backup that includes multiple cartridge-specific identifiers if you want to use "online mode". From my limited outsider perspective I'd always assumed these were required to be present for the Switch to even recognize something was in the slot, as the slot uses a seperate circuit and chip to ensure validity before passing it through to the Switch. I never thought of the possibility of them including a (currently) valid ID for you!

Unless the developers have managed to obtain an official private key from some publisher in order to digitally sign their certificates, this thing really isn't gonna survive long, is it? Nintendo could ban the cert (or, if it's bogus, enforce stricter verification) and/or flag everyone using it (maybe even retroactively?). Why would they even make it have an identifier in the first place, since they already want you to provide your own and all it does is give Nintendo something to ban?

Sorry for my rambling by the way