A sad day for emulation and open source advocates, and a reminder that Nintendo can and will destroy you if they see fit.
Hopefully their works will live in the saved repos just as ReVanced was able to live on after YouTube shut the original project down.
From the little I’ve read I think it’s the patreon money, the support to make things work like keys etc, showing a list of working games, and generally being blatant about using it for playing pirated games in their official communication