Oldies music on an AM station in a market like Philly might be a tough sell for both gaining listeners and spot revenue. This is especially true when there is an FM oldies station in that market. Granted WOGL is boring as they do play the same music over and over (yet they have great ratings so someone likes it), but it seems any time an AM station runs up against an FM station with a similar format the AM will lose as people prefer to listen to music on FM as it is in Stereo without all the static and the frequency range of sound is broader allowing better highs and lows to come through. Listening to music on AM is similar to listening to music from an old 78 rpm record, scratchy and limited frequency response. So even though I'd personally prefer to hear the old 95 WPEN Oldies again rather than sports talk, I think I'd have to agree with WTUX that the money is in sports talk even with less listeners. It doesn't make sense, but I've had numerous radio people explain this to me and they all say the same thing. Bottomline is how much are they billing. Sports talk apparently does bill quite well as the demo is a very desired one that even with fewer listeners the advertisers will pay to get.
Now in market like Wilmington where WOGL doesn't have that strong of a signal to be able to be heard at work ( you can get it in your car, but quite often not in office bldgs, etc) and WVLT from Vineland has even a weaker signal, (1260 WAMS is even more difficult to hear in office bldgs which is unfortunate as they do have great Oldies music) then maybe a station like AM 1290 that does have a strong daytime signal probably could make a go of airing Oldies if they don't skew too old by playing too many 50's songs. They'd probably have to lean more on 60's and 70's with some late 1950's oh wow songs, sort of like the ABC Unfortgetable format that skewed 45+. They probably could make a go of it, but again from what I've been told by numerous radio people even in Wilmington as AM 1290 is a Fox Sports Radio station with only a few local programs and some U of D sports and Penn State sports, and Wilmington Blue Rocks Minor League Baseball probably would still bill higher than an Oldies AM 1290 that had more listeners. Which is probably why Clear Channel is allowing AM 1290 to remain sports talk and not going Oldies or Standards or Political Talk.