Part of figuring out your sustainable business model, one need to know if a business idea can gather traction.
Concretely, this means you should use validated learning to see if your idea has merits. Running a smoke test or a MVP that’s just enough to draw feedback are great example of how to do this.
It is important to measure the correct metrics, your CTA seems the most likely. But be sure you are not data-driven but be data-informed.