It's being run as an experiment on the part of the local Conclave.
While every Inquisitor has their own pool of trusted retainers, sometimes losses break that connection. Usually it's down to the death of the acolyte, but what happens when it's the Inquisitor for whom duty has ended? The acolytes could be liquidated, but they represent a pool of time, training and talent .. better to see if they can be re-used by the Conclave as a whole, and in time they mind find permanent service with another Inquisitor.
For the time being, they are effectively ronin.