Jacs has a thing for slave traders. A hate thing. A passion to destroy the market of owning people. It may have something to do with her TRAGIC HISTORY of being a slave herself.
Jacs is a privateer sanctioned by several governments to stop the trade of living souls that is legal in the majority of countries in her world. These governments would rather not get involved in direct confrontation with the larger ones, so she doesn’t let on that she’s doing the good work of the small guy. She also wants some profit. So she knocks off the captains of the slave ships, claims the merchandise as her own, and gives them two options: Stay and work on the ship or swim back home. She pays a small wage if they stay, which they can save (to pay Jacs her fee for saving them) or spend (she let’s them buy whatever they want … from her) as they please. Once they’ve paid off the fee, they’re free to go wherever they want. Many end up staying because they’ll make more and be safer on her ship than if they would go back home.