I've been trying to. Last time I had recruitment open, I got two applicants. I accepted both. I've reached out to various otome writers as well and generally received no interest. Anyone who wants to write reviews right now, is already doing it. And the rest who want to, and want to join the team aren't quite at the standard I want.
I absolutely love your idea, and in the future, I would love to do it. But right now it is limited by budget, manpower, and the fact most publishers are not going to give me three review keys.