> That's the hallmark of a nation state that has previously been exploiting these, but since decided - for whatever reason - that the vulns have become too risky to leave undisclosed to the vendor.

I think it just means the person doesn’t want to be named.

What? This isn’t true at all.

Many people just prefer to do their work anonymously.

https://support.apple.com/en-us/HT213346

Here’s a neural engine bug where one researcher was anonymous and the other wasn’t.