No. If you hold a license, you are obligated to operate the station at the licensed power. Not caring is not allowed. In this case, they were required to opera

No. If you hold a license, you are obligated to operate the station at the licensed power. Not caring is not allowed. In this case, they were required to operate the AM station to keep their FM license. In addition to the usual threats to license and fines etc, they were also risking their FM license which persumably was ROI positive.