The DXer is at best, a non-factor, at worst, a nuisance to operators of AM stations, because advertisers, even national ones, are buying time on terrestrial radio to reach LOCAL listeners. If Honda advertises on WBZ and someone in suburban Washington hears the ad and winds up going to Honda of Silver Spring or Alexandria Honda and buying a car, that's not what the ad on WBZ was purchased to accomplish. Honda spent the money to put its brand top of mind for Boston-area listeners and get them to buy their next car in Burlington or Braintree. AM stations are wasting effort and energy reaching people who don't contribute a cent to their profits, because advertisers only think local and won't pay extra for the DX coverage AM provides. Eventually, they'll all have to move to FM. If no FM frequencies are available, they'll have to throw in the towel. No radio station is too big to fail.