Bad idea, sorry. 16% of radio listeners listen to AM at least once or twice a week. A lot of ethnic radio can only use AM, because FM is full in many markets. Whenever I listen to the local Punjabi station, I hear plenty of local spots. Same thing with one of the local Regional Mexican stations. AM may be "sentimental to aging Boomers" but there are other listeners out there who use AM, including ethnic businesses who can not advertise in their languages on local TV and local commercial FM radio. The AM station, decidated to serving their community, is all they've got. That and print, and maybe the business's website, which may or may not get hits or engagement. But they advertise on these stations, and they do it for a reason.