It wasn't that difficult to guess that those miners they were seeing were slaves instead of workers. Shane could see the legcuff or maybe the ankle bracelet they were wearing.
He had actually seen this being sold in the Marketplace. It was a decent item to control the prisoners. However, with his Title Effect that could increase loyalty by 2 points every day, it wouldn't really be necessary.
They just have to get imprisoned for several weeks, and they would slowly become loyal to him.
"This…"
At this time, Sandra also used her Enhanced Vision and saw that the enslaved people were mostly kids… There were definitely young teenagers.