In 2015, the nonprofit website disclosed that three quarters of its roughly $ 100,000 in revenues came from donations, according to publicly available tax records. (businessinsider.com)
The help of 500 volunteer mathematicians is right in your hands with this nonprofit website. (parentingsquad.com)
Also many campaign and nonprofit websites will have a site credit at the bottom (or in source view if you're looking at the HTML). (epolitics.com)