Yeah, this seems to be a common pitfall for popular tools/projects. I get that the creators pour an astounding amount of effort into these things, so it’s not unusual to desire compensation for your work.
That said, it pretty much guarantees that your little project has no chance of continuing to stay off Nintendo’s radar anymore.
As an aside, I also really dislike this slow shift in the hacking/modding culture away from the “everything should be free” ideology. Every hobby does not need to be turned into a job or supplemental income stream folks!