I think it's a bug and I could have sworn I saw a patch note about this already, but it's not on the current patch notes so who cares, bugs get patched and re-added constantly. However I think this beneficial bug is fun and useful. By obtaining all the Minor clans we can prevent the cheating, annoying, horribly designed AI factions from getting to constantly hire them when they should be out of money and leaving the game already (I mean if it was designed well).
To get them you must recruit them from the prisoners dialogue with the clan leader, but it seems unusually easy and cheap. I don't know if it will have issues later but I've had them for a bit now and they seem to function as a normal Vassal Clan fine.
To get them you must recruit them from the prisoners dialogue with the clan leader, but it seems unusually easy and cheap. I don't know if it will have issues later but I've had them for a bit now and they seem to function as a normal Vassal Clan fine.