What exactly are you building that building it isn't already its own reward? Oh, really? I see...
I'm not sure if I'm misreading this, but your tone sounds quite snarky. That kind of attitude is not exactly the normal tone for comments at HN. So, I appreciate this article, but the content does seem somewhat redundant to HN. Every now and again a new life-hack article will appear, and then talk about Pomodoro, then people posting links to their time saving apps. It's a tested technique, so why not? Maybe it really…
Productive doing what exactly? Nevermind that, money!