I've had multiple publishers explicitly say they're interested in pitches or samples, put in tons of work to make bespoke samples to their specifications, then had them do one out of: Never responding, Responding to tell me to send it to somebody else who doesn't repond, not responding and then a year or more later being like "whoopsie, we lost our slush pile to a clerical error!", saying "Ah sorry, we got you to do this but decided instead of an artist we're going to use a cheaper option", saying that they WERE taking pitches, but now they're not, saying "Ah, we want pitches, but not manga style" (wtf why did you even ask a manga-influenced artist to pitch then!?).
Every time, it's like "Oh come ON!"