The only way you can argue what you seem to be arguing comes from a sort of transactional theory of action- provided I am paid for my actions I am therefore not abused
I wonder if porn apologists might think that if this man and others like him were to toss a few coins at their victims after they had raped them, then it would make it all ok. Is that not the same as the wages paid to those women exploited by the porn industry. It seems that too many people assume that just because something is a paying job, that all jobs are equal, and that no exploitation is involved. its simply a transaction. A worker contracts freely to sell his labour to an employer, who contracts freely to pay him. Except that we are all forced to sell our labour, there is no choice. But when exploitation is woven into the economic system that governs our society , it makes normal even the very worst forms of abuse and exploitation, and it makes it seemingly ethical by compensation.
As for those arguments that rest on the idea that only a sick individual would seek out rape porn, and that porn (or indeed any media) doesn't influence the actions of people, you are quite ideologically interpellated, unable to think outside of the influence of this very media you seek to defend. I suspect that those who defend it, watch it.
Advertising has no effect on you, the influence of authority, your parents, friends, church, the news and mainstream media has no effect on you, really? No man exists outside of society, to be outside of society is to be not human. Our subjectivity, our belief systems and our biases are socially conditioned, and in a society that uses the rationale of the market to argue backwards to morality or uses market ideology to make normative statements, is a society that is reducing all actions, all things, and even people to commodities.
As for some women enjoying watching pornography that depicts women as submissive, as victims, and as being raped, well, is that really so surprising. If we are conditioned to think in certain ways, then it stands to reason that from the very earliest our sexuality is molded to be submissive. And if women are objectified in all ways, and in all media then women come to have two views of themselves. They perceive themselves from outside and from inside, two perspectives. We watch ourselves, we are subject not just to the male gaze. And if women's value is in her beauty, and in her submission then we idealise this.