I don't know much about the AdSense revenue system except the fact that the earnings, if any, gets accumulated at an excruciating pace.
Regarding the basic issue raised by the author, I remember having gone through discussions regarding the subject matter in the forum section several times. It is said that both the thread initiators and the authors who post responses become eligible for sharing revenue.
Revenue share bonus is distributed among top twenty contributors who keep the hearth hot. It is almost dead sure that the RSB will be announced in respect of the previous month will be announced on the last day of the current month and cash payment thread generally appears invariably on the first day of the month next to the RSB announcement thread.
Other than that, many contests are announced from time to time and prizes are awarded to encourage new authors. However, only about few hundred authors are active and a core group of contributors is regular and consistent in posting contents in various sections of ISC.
Let us encourage each other in sharing knowledge.