Just because someone played your game or view the game page doesn't mean that they viewed an ad. First, let's look at one of my games. In the https://www.newgrounds.com/projects/games section of my profile I see that it says I have this many views:
But, if you look at the game page is states it has this many views:
So in fact, only about 21% of the people that viewed my game or played the game saw an add. Do the math on your submission really quick...
Meaning just under 200 people have viewed ads on your submission so far. (A rough estimate, not an exact science)
Why is that number so different? Well, first off about 40% of internet users use some sort of ad block. This means that right off the back if you had 1,000 views you'd actually only have 600. Match that with some of the views coming in from mobile, which your submission isn't compatible with, some people only passing by without playing at all, and adding in the newgrounds users that are supporters who don't view ads and you get a much lower number.