Not sure this qualifies as insane. Seems more like a self-defense maneuver to me. People have harassed and stalked this man to an absurd degree over features they wanted and bugs that bothered them that in some cases only existed in forks like Swanstation.

This is on top of this guy working a full time job. He can do what he wants and give away free code to the world on whatever terms he sees fit.

Basically, he got too famous and entitled assholes started treating him like a public slave.

It sucks and I'm sad to see him turn the project away from a true FOSS license, but I'd rather he contribute public code than not.