While I am not clear whether the author wishes to know about the AdSense earning performance within this site or in general, I guess the rule should be the same - Create quality content which has potential to attract traffic.
However, the performance of my AdSense earning has not been impressive so far. It has been near-about an year since I got my AdSense approved, but majority of the earnings that it makes are from some of my abandoned blogs which no longer get updated by me. After about an year, I am yet to reach my minimum payout threshold of 100$, but I guess my income is gradually increasing month by month.
Doing the calculations for you, the one who is not making 100$ in an year, is earning less than 8$ every month on average..
I suggest the author to kindly stick with contributing content in IndiaStudyChannel, The reason why I could not earn enough from ISC may have been that I have not contributed as many articles here. Even my SEO is limited to its basic applications and my limited understanding. Mostly, my internet connection remains too slow to make use of better keyword research tools. While they should not be used excessively, a smarter use of the in optimizing your content may bring more traffic from search engines, which is good for our overall earning.
Take it this way... I am a good example - Even after my limited contribution to ISC, I am continuously earning several dollars every month. This makes it clear that the one who contributes more content in Article section really has stronger chances to earn much more and much faster.
"Your value does not decrease based on someone's inability to see your worth"