In its radio fund-raising campaign, National Public Radio (NPR) stated, "On-air radio membership campaigns are the most cost-effective means we have for raising the funds necessary to bring you the type of programming you expect." NPR is commercial-free, member-supported radio. Most of its operating funds come from private individuals, corporations, and foundations. Twice a year it interrupts its regularly scheduled programming for fund-raising pledge campaigns where listeners are encouraged to call in and make pledges. Critically evaluate the passage quoted above.