I think the thing that has drawn me most to NaNoWriMo simply that is that completing it is success. Getting to 50,000, that's the goal. It's constant. I will get there. I have gotten there for several years in a row. This year has been harder. Between juggling a full dramatic show with teenagers, doing my full time job, doing my part time job, and other assorted crises, words have been harder this year than ever.
So why do NaNo? Because I'm chasing fame? Hardly. My success as a writer isn't tied up in my fame. My success as a writer is in sharing the work and the ideas that I have in my head. It's completing the work in my head that I have half written outlines for. Success is just knowing that it is "done" and then you can find the next thing to accomplish.
Fame is what drives many of my students. After all, it could be a lofty goal. It seems that famous people are more successful. They, famous people, seem to have combined love, fame and success in one fell swoop. Fame can last for as long as possible with some who have managed to make fame look desirable.
But that is not why NaNoWriMo continues to be churned out in little spurts here and there. Success is an easier stick to measure the world by.