It's the Privateers' job to hit traders in Kusari. As Blunt points out, we base out of Tau-23, and there are plenty of jumpholes, along with a few friendly bases, we can use around Kusari. We get around the same way that the GC and BD get around.
Interestingly enough, the AFA has the same job as the Privateers: Hitting traders in Kusari. How often do you really do that anymore, rather than fighting a war which is the KNF's job? Both the AFA and Hogosha are supposed to be loosely approved-of by the KNF, not openly allying with them.
