Rabea is a helluva player, I can see why they gave him one.
I was watching Rob Arnold's (Chimaira) channel the other day and he mentioned something along these lines. I don't remember verbatim what he said, but ESP stopped producing his RA models due to his status as non-touring musician.
It seems companies are starting to shift from the traditional, "you gotta be on tour in front of 100's of faces every night to warrant a signature guitar".
They're in the business of selling guitars, so why not? I may not personally agree with whom they give a sig model to, but I'm old enough to know my opinion don't mean ?. ?