This is the side of feminism that, frankly, can fuck right off. It's a completely hypocritical movement. Feminists saying "Women can do whatever they like.....except for you, you do porn so fuck you, and you, you watch porn, so fuck you, you support women being raped and trafficked" what a load of bollocks.
I do understand this reaction.
I think the reason that women/feminists are so divided on this issue is that, for some women, it looks like:
These women are making a free choice. They are earning their own money. They are supporting themselves and their children. And they make good money doing it.
And from that perspective, it becomes easy to support it.
From the opposing perspective, it looks like:
There are still very few discourses of womanhood in which women can position themselves. One of those discourses is women as sexy/available to men for sexual gratification. We don't need to debate whether that is true or not because we know it is.
So depending on which angle you look at it from, porn, prostitution is either liberating and freedom for women, or the ultimate subjugation as it renders women completely upon their sexual desirability to men to even house, clothe and feed themselves.