I see way too often that many projects market themselves (oh the irony) as "non-profit" as if that's some kind of superior virtue. It's not. While there is nothing wrong with willing to work for free (I have done that myself my entire life), there is nothing wrong with working for profit either, even if solely for profit. I think that the idea comes from a false dissociation of "profit" with its actual counterpart, "resources". Anytime you work "for profit", what you mean is simply that you are willing to exchange your resources for someone else's resources. There is nothing wrong with free resources exchange, it's the largest and most efficient unconscious collaboration mechanism humanity has conceived. Open-source projects are sustainable models when there's a large enough user-base that are also devs that contribute to the project largely by own interest. It's just another way to exchange resources: my dev work for your dev work, and we are all happy. "Crowfunded dev work" if you wish. But there's definitely a resource you're exchanging and for as long as you are putting less than what you are getting, you are in profit, even if no money (aka "dev work coupons") is involved. Profit, regardless if calculated with money or not, is a sustainability compass that allows the massive economic web we live in to exist and coordinate itself regardless of scale. It must be embraced, not demonized.