Everyone in my tank eats them. I can see them picking at them. I have clowns, anthias, hippos tang, mandarin goby, royal gramma... They all eat them and the population has been steady. I do have a fuge though.
It can't hurt to get some. Tigger pods, copepods, whatever... It's all very good stuff and once introduced (do it with the lights off while the fish are sleeping, otherwise they get eaten REALLY quick), they will take off and be in the tank forever. (as long as there is no copper)