[lbotos]

I knew it was a small niche market, and I set it as really a "reasonable" goal.

"If 100 people in 30 days are interested with this ad spend, then I'll reach out engage them and build the thing."

Depending on your app/market, you can change that number accordingly, but I think 100 is just a great "feel good" number thats hard enough to hit as evidenced by my test.