I don't think the 2 women were high up, experienced, cold blooded killer types, We don't even know if they were the ones that beat up and branded her.
A lot of trafficked girls end up growing up to 'work' in the organization. Most have no place else to go and are brainwashed.
Imagine a scenario where the 2 of them are sent on an illegal errand to Redding. They maybe dropped off some female merchandise to another trafficker. They maybe snorted some meth, smoked a blunt and are driving back to Sacto. They are talking about how much money their boss just made selling those girls they delivered. Thinking that they should start doing their own deals and make bigger money.
So high on meth, and feeling bold, they drive past a petite, blonde, all alone on an empty road. They already have a gun and chains with them because they just dropped off a few women that morning. It was the perfect time to set their new plan into action. So they did.
If you start with this scenario, then many of the reasons people don't think it was trafficking can be explained. JMO
Being inexperienced, they would make the mistake of abducting a woman with a husband and extended family that would fight hard to find her and create publicity. that was a big mistake on their part.
Then they had to deal with the situation when their boss did not want to 'buy' the merchandise. Perhaps he told them to wait and see if it died down and they could move her around then. When it didn't, they may have tried to shop her around to other buyers. That would take time.
She may have been left with one or two of them hence the injuries and branding. But they may have been too nervous about the publicity.
I am not surprised they did not kill her. These 2 women may not have been hard core, killer types. Maybe they just wanted to cut their losses. It will be a lot less jail time for them now than if they had killed and buried her first. jmo