Not sure if this has been mentioned, 1. I hate crickets lol 2. They are really jumpy , revert back to no1 . Anyway I sometimes put crickets in a a fridge/ freezer bag and pop them in the fridge for a bit ( just a minute or 2) obviously

make sure the bag is secure, to slow them down, before putting them into a feeder cup ,run . Usually by the time they have warmed up its to late. Nah but seriously i put some food in the feeder also so when they do warm up , they are more inclined to Stay there for a bit , personally the only feeder I would free range is my locusts ( other than black soldier flies and hopefully silkmoths) to add enrichment and natural hunting and exercise