I posted my first mac app yesterday.
https://news.ycombinator.com/item?id=5668813
It got just 20 downloads (USA) and it went to the Top 75 in the Utilities category. I guess I missed the inflection point by just little bit.
The surprising part here is, all except 75 apps in the category gets less than 20 downloads? Whoa! Very little people on the top can make a living out of app development.