I have honestly never seen my zoas react to feedings. Some of my palys will exhibit a feeding response and anecdotally I also see those palys grow more when fed. I have seen some growth response to adding some of the zeovit line to my tank as well as aminos... but that also happens when my tank is receiving more attention... so I cannot be 100% certain of cause and effect. Zeovit lineup I used: sponge power, pohls extra, lps aminos, and coral vitalizer. I also cannot be sure that it isn’t a single additive in the line that makes the difference. I can say that my hornets (rainbow and blue) seem to be indifferent but other varieties like my fruit loops have gown over 5x as large very very rapidly.
But as far as a particulate food is concerned I think it just helps keep my nitrates up in the tank.
