Well, if the service becomes popular, the OP will find himself sitting on a nice rolling account of cash (the funds that haven't yet been spent or returned to donors), which might be capable of generating interest. I can't imagine that income being appreciable (or entirely legally kosher), but who knows?
It's easy to make money on anything that is popular.
The "profit" made on top of adding a small fee. on top of Balanced's fee, is so minuscule and quickly eaten by shipping costs.
Right now, I'm more interested in building something that makes a profit just for the hell of it. All my other side-projects are making me absolutely nothing. ...nothing but resume padding :)
