Don't know about pineapple chunks, but have you tried banana?
I watched a guy using it last summer and he was the only one catching.
It was a hot day (remember it?) and I was giving the surface a rest, I sat and chatted, and he said it works when nothing else will.
he tore a piece off a firm nanna and pushed it on the hook then he flicked it out. He said he had had a couple and I saw him land a ten pound common.
My guess is they pick it up out of curiosity, rather than hunger.
Yes I have tried it myself, didn't catch, but I will be trying it again.