Truth is not subject to voting and Kickstarter has proved that they consider women inferior and in need of protection by banning this type of content.
Same goes for the misogynist manuals they're now taking the ethical stance against.
So much for your ad hominem. I'd give Kickstarter kudos, except ethics are what people are supposed to have.
Think of the difference between a book on the history of racism, with very explicit quotes, long, in dept conversations with racists, scientists and policy makers, the authors own experience in these groups, etc and the latest publication from the KKK.
A seduction guide is the first. "Rapists Quarterly" is the second.
Also nicely done working an adhomium in there.
I think seduction manuals are immoral because they essentially treat women like min-maxers do video games--do this, and your chance of success is raised by X%, follow this procedure to succeed, etc. It makes women into vending machines that, if the buttons are properly pressed in the right succession, will theoretically result in a prize--sex--being dispensed. I think that treating people like that is immoral. Can I prove this logically? Can I claim that this is a universal truth? Of course not, but the same is true for every moral stance.