Using paid ads to validate a product

I launched applimiter.com by mainly posting on social and brought in 500 views. I've had mixed feedback but no sign ups. I also ran a poll and most said they would hand roll this kind of code. However, after having dogfood Limiter with itself, I know it's not really trivial to implement such a solution. Do you think it's a good idea to try paid ads with a small spend next? Or focus to on SEO and content marketing?