As I mentioned when I started, thousands were taken into captivity. Most of those who were rescued were mostly bought by their own families or relatives or friends. Right now, as ISIS is being pushed from Syria, a lot of the jihadists, when they want to escape from Syria and need financial support for that, will offer some of the Yazidi women for sale to their families. They usually ask for $25,000 or $30,000, though, and that's money the families do not have.
The problem is that there was never a special task formed by the Iraqi and Kurdish governments. I think both were responsible for this genocide on Yazidis and failed to protect Yazidis. They did not form a task force to follow up and try to rescue these women and children. Most importantly, this coalition that was formed to fight ISIS, which I think Canada is part of, also did not follow up specifically on the issue of Yazidis held in captivity, especially in Syria.