Maybe that's the new load. Take the defective decoders, put them on a pallet, and use them as a piece of strange-looking freight.
Of course, that wouldn't work here, because the doors don't open, and no one could see it...
I did see an ad quite a while back for a decoder-equipped HO boxcar, with a remote-controlled coupler, but couldn't see the point. The only way to use it was to uncouple something from that one car, and at the price quoted very few could afford to quip the entire train. Locomotive, maybe, but even that would be of limited use.