No one's making the argument that porn's good, but a lot of people either genuinely assume so or want to signal that they're really pragmatic and modern and liberal. (If you think everyone's just bracketing the moral questions and that it's appropriate to do so, ask yourself how well a post on successfully marketing on white supremacist websites would fare.)
I'm not going to make an actual case that porn is evil either: it's clear we'd have to do a lot of work on finding common philosophical ground first, and I don't have the time. But in the face of apparently-overwhelming social acceptance of evil, it's better if someone says, "Hey, everybody, this is wrong," even if they can't convince people of it at the moment. Since I can't find much to upvote here, I'll be that guy:
Pornography is evil in concept and in practice. Building your business through it is considerably worse than, e.g., using huge email spam networks. It beggars belief that--in a community that can at least entertain the idea that it might be wrong to create a business by exploiting people's lizard brains with notifications, gamification, and misleading social ads--ninety-eight percent of comments on using porn to promote your business either avoid considering morality at all or go out of the way to indicate that everything's a-ok here.