I mean, genuine question, is Linux Mint or MX Linux endangered by this?
Unless I'm missing something, I have zero concern for companies who sell out by complying.
The code was "free as in freedom" when you decided to build your company on it; and while you're not legally obligated to defend that freedom, and I, and hopefully other consumers, find that you are morally obligated to.
Not by the California law, since that law poses no danger.
I think this is the way that Linux desktop distributions are endangered, quoting from the article: "... apps and websites will not assume liability when a signal is not provided and assume the lowest age bracket. Any Linux distribution that does not provide an age bracket signal will result in a nerfed internet for their users."