Two questions:
--Were there any "spot" local commercials in radio's golden age? Most of what I've read implies that network programs were either sponsored by a specific company or were "sustaining" shows with no commercials. And if there were no local commercials on network programs, what were the incentives for affiliates to air network shows.
--For that matter, why did networks produce "sustaining" shows that earned them no ad revenue? And why did affiliates air them?
--Were there any "spot" local commercials in radio's golden age? Most of what I've read implies that network programs were either sponsored by a specific company or were "sustaining" shows with no commercials. And if there were no local commercials on network programs, what were the incentives for affiliates to air network shows.
--For that matter, why did networks produce "sustaining" shows that earned them no ad revenue? And why did affiliates air them?