If that spammer's stories reach a hundred then this website will be full of unnecessary promo spams and there'll be more accounts he could create to spam even more unnecessary phone number promos. One of the admins on another post says that these spammer accounts are in all likelihood are people involved in a group that are attempting to scam users on the site.
It's not the fact that he has hundreds of stories. It's the fact that ALL of these stories are spam ads rather than regular stories. If this guy continues to spam these stories, other users won't be able to promote their stories.