Since 1970, more than 200,000 nonprofits have opened in the U.S., but only 144 of them have reached $50 million in annual revenue. Most of the members of this elite group got big by doing two things. They raised the bulk of their money from a single type of funder such as corporations or government – and not, as conventional wisdom would recommend, by going after diverse sources of funding. Just as importantly, these nonprofits created professional organizations that were tailored to the needs of their primary funding sources. – William Foster & Gail Fine