This poses a bigger question that many like myself have been asking for quite
sometime, does "AM Radio" have a future at all?
In your smaller markets, depending on the format and power of these stations,
it lies on how these owners are selling the product, and some are not doing
so, which is why some will go dark.
As for your larger markets, those with 10,000 or 50,000 watts, they continue do
do well, but in the last few years, many cities are now simulcasting on FM, mainly
those with a "Talk" format, and i expect this trend will grow.
In addition, the Internet, barring no further regulations, will play a role in whether
or not AM survives.
I understand in one country, AM is being dissolved, when this takes places in
other nations, like the United States or Canada, remains to be seen.