Ask HN: How to sponsor a nearly free fax service?
I'm writing a hassle-free fax as a service application for that one time per year that you're reduced to returning to [1995 to use a fax.](http://dilbert.com/search_results?terms=1995)
I don't want to make money on it, just break even. How can I employ this in such a way that prevents abuse (someone programmatically hitting the app for their own fax service) without having to charge a user an exorbitant fee to cover CC transaction costs? I'm not willing to fund it with adverts, I hate that. Ideas?