I didn’t realize there was a limit until a few years back when I hit the maximum. I wish Amazon would increase it! To be honest, I find their tracking system pretty messy and think it needs an overhaul however, it is great for testing what works and what doesn’t. Most of what I’ve written about in other tips in these articles was learned through tracking.
You could try advertising more, for example, by putting up signs around the neighborhood, posting about it on social media, or having people you know spread the word. You could also try doing it in a different neighborhood that might have friendlier people, or do it in a time and place where there's likely to be a lot of people walking around the area (e.g., near a church before the end of a mass).
Regardless if you need to earn some fast cash or we're just talking about making money in the grand scheme of things, there's an important psychology that needs to be mentioned before getting into the strategies. If you study Freud's model of the mind, you'll discover the Psychic Apparatus. It's the three-part construct in your mind that controls all of your behavior.