Aside from those, they were also offered a bit more management rights and promised more supplies from that base.
Zam and the others hadn't shown their full capabilities when they demonstrated some of what they could do, but they had still shown considerable strength compared to all the people in that base; so when they arrived, they were immediately offered management rights to entice them to join. Of course, those management rights actually weren't those that were good, as they hadn't even offered positions that could really affect that base.
But aside from promising those management rights, those who had talked to them also gave a lot of examples from their people, letting Zam and the others know that they would receive and could hold more power later after proving themselves and staying in that base for a long time.
