I have no idea if they are nutritional are not, but I know that most say "shrizimp" are better than feeders. If ghost's are included, then I suppose so. I also wondered the same. Regardless, I don't use them as a staple feed, just for fun.
Yeah, def. not an everyday thing. A treat once in a while as it is amazing to see the colors show out from the "thrill of the hunt" I suppose. Have to be better than most feeder fish I would think.