You're missing my point.
Large, broad audiences are more advertising-friendly than small audiences, even dedicated ones.
Beyond that, you seem to be missing the point of BROADcasting. You know, large audiences, mass appeal. I loved FNX. If anything were to ever happen to 'BRU, I'd be devastated. However, I get why FNX is dead, I don't think it was a pointless death, and I think it was totally warranted.
We'll always have the memories. No station will ever replace it, but a station doesn't need to. I like 'BOS. Don't like it? Don't listen to the radio. It ain't 1978 anymore, and things aren't ever going to be that way again.