* it's not what I want - I prefer to deliver it for free and do not plan for it to become any source of income, just to not have costs scaling with popularity
* I don't need to sell it - I'm reasonably wealthy, with a good 40h/week job and salary. This is a side project and will loose it's charm when I convert it to a business project.
* it's hard - I work on a browser-based game (no easy to implement payment options)
In other words, it needs to be free for users and possibly earning just enough to not cost me anything.