This is actually one of the more important aspects in publishing. But its not so much the author themselves being sellable, its the built in sales they might ha

This is actually one of the more important aspects in publishing. But its not so much the author themselves being sellable, its the built in sales they might have from their social media audience. The conversion rate from marketing to their own audience is much higher than otherwise, and is enough for even small publishers to justify an initial print run of a niche book.