Or a different title for this article because it assumes a lot of legwork has already been done. "How to get your app noticed when you already have a different app that has a userbase" would be more accurate.

This current title makes it seem like it's tips for getting the word around about your app (xda, reddit, HN, whatever) and leveraging that, giving away paid versions for free to a specific community etc. At least that's what I'd expect from a post titled like this.