This is simply not true, at all, and NPR themselves deliberately try to obfuscate the truth. "NPR's two largest revenue sources are corporate sponsorships and

This is simply not true, at all, and NPR themselves deliberately try to obfuscate the truth. "NPR's two largest revenue sources are corporate sponsorships and fees paid by NPR Member organizations" NPR member organizations are government funded, and then that government funding rolls back up to NPR. So, they're mostly funded by ads and the government. Source in other comment.