Hi,
We've bee AirBnB hosts for a few years and when we get a reservation request we always check their reviews from other hosts first.
With the latest request we had there are no visible reviews for the guest despite him being a memmber of AirBnb since 2015.
I notice though that there is now a link under "About this guest" which says "Learn how you can get access to guest scores" (I'm translating from Dutch here so it may say something a little different!)
Apparenlty the score would be visible if we turn on "Direct reservartions" is this a new rule from AirBnB that you can only see the reviews of reservation candidates if that is switched on?