Not sure if this is the right spot for this question, it is not about finances per se.
I have been developing a website/web app for over three years now, and in the beginning this was a small undertaking, the client paid a small fee to have the site/program built.
Since then, the company has become semi successful, making what I think are fairly good revenue most months. During the process, my monthly income for the site has been very modest, whether I work 60 hours per month or 10 hours per month. Without giving specific figures, I am paid most months what a professional developer would make in 5 - 10 hours (I have been a developer for 14 years and it is what I do for my day job).
Also, it is a frequent thing that I am often interrupted or expected to be on call weekends, and sometimes during vacations, late at night, etc.
I have never forced the issue, but I did development for less than what I would charge with the hopes that maybe it would pay off in the long run... perhaps a partnership deal or at least a percentage of the revenue. As I said, sometimes putting in 60 - 70 hours per month and getting paid market value of 10 - 5.
It has come to a point where I think I am going to have to leave the project, but just wondering if I am off base by thinking that I should be offered a good portion of ownership in the company or not.