500 is a small sample size. Moreso when your tool serves a very specific target of people looking to satisfy a particular need. I would try user profiling and

500 is a small sample size. Moreso when your tool serves a very specific target of people looking to satisfy a particular need. I would try user profiling and then search engine optimization or content marketing around use cases where people will want to use it. You also want to compare it against the apiary's of the world.