He's got vested interest in gargling Musk's balls.
“I’m about to finish this book and I want you to know that I respect the hell out of you,” he wrote on February 11, 2020. “Ever since I started learning about your work ethic and passion I’ve been more motivated than ever to make a difference. I look up to you.”
To note, 2020 was a couple years after Musk called the cave diver that saved kids a pedo.
That was the moment that all rational people figured out he was a complete asshat. Mr. Beast didn't.
In my view, it means Mr. Beast doesn't actually respect Kris very much, to keep being this buddy-buddy with Musk.