Since the boycott I hear too many PSAs on WABC NYC 770 rather than real ads.
Are you listening online or over the air? Online, most station breaks are PSAs rather than ads. Besides, the radio stations have many advertisers who pay to be on whenever, not specifically during a particular show, and would simply fill in, using them, any space opened up from an advertiser who time-shifted an ad at the particular time Rush was on. See
THIS.
Oh, I have been listening on my portable radio on 770 AM since July 4, 1988. - Never online .Sean Hannity from 3 to 6 has noticabely fewer PSAs. If I had the chance , and it meant anything I would write down those not PSA.