Again, this has NOTHING to do with piracy. That's a textbook fallacy, trying to discredit an argument by attacking the person making it rather than addressing the point itself. It doesn't work here. The homebrew community isn't about piracy. If it were, this forum would already be shut down. The issue is simple: someone took a GPL-licensed emulator, ported it, and didn't publish the source. That's a license violation, full stop. It's not credit what the license means, it's the modified source code published.
Look at the license from the repo:
https://github.com/devmiyax/yabause?tab=GPL-2.0-1-ov-file#readme
So if someone distributes a GPLv2 emulator binary/port for Switch without either shipping the modified source or a proper written source offer, they are not complying with Section 3 and are in violation of the license.
If the dev wanted to build an emulator from scratch,
not based on any GPL code, and keep it closed source, sure, no problem. But since it's not the case, he accepted those terms when he modified the original code and distributed it. Can't just pretend they don't exist.
Keep crying "BuT pEoPlE aRe PiRaTiNg11!1!!" while forgetting that without free software like this GPL emulator, you wouldn't have Saturn emulation at all. The best ones (Yaba Sanshiro 2, Kronos (both forked from Yabause), Ymir, Mednafen) are all GPL-licensed. Forget that small thing and the entire scene you love and want on your Switch crumbles.
Also, to the mods: I think we should close any thread discussing Tico. It always devolves into silly flamewars like this, and it doesn't make sense to discuss with people dodging the actual issue. I even saw empty messages from the dev a few posts above (guessing multi-account caught in the act, and I bet these people came from the Discord where they talk about Tico). When he releases the modified source as GPLv2 requires, obviously he'll be welcomed back to discuss anything.