If chub won't eat it nothing would surely.
I haven't put any on a hook but I have watched carp slurp it down. Only one place I saw it happen, a park lake where lots of duck feeding took place. Some very good fish, some pushing 20lbs, would cruise beneath the ducks trying to beat them to the bread. They lived in relative harmony tho as there was plenty to go round and so much gets broken up by a duckbeak to create a virtual shower of particles. Roach and rudd finned around more nervously beneath both ducks and carp. Again some good specimens amongst them. The carp of course were greedier and competed for larger pieces off the top. Ducks however do not like popcorn. Not these at least. They picked up popcorn (and this is the relevant point I guess) but quickly spat it out. Some yoofs had thrown a bag of popcorn on the water and there was a lot out there. Spat out popcorn was taken casually by carp after carp. When the bread ran out the ducks left and the remaining popcorn disappeared underwater at a steady rate. Then the carp sunk away too. Pausing poignantly by the No Fishing sign.