Have you read the documentation? It contains a lot of useful information. In conclusion, just try playing around the the preconfigured crate config, perhaps adding more types of food into the food crate. Food Crate Config Food Crate in Action Documentation
Great plugin. Adds a nice touch to a server! Yes I do agree though, the config is slightly confusing.
After you put the item id and amount, you can add data values. For example... /give %player% 311 1 name:R_Armor 0:3 This would give the player an Diamond Chestplate(311) that has the name of R Armor with protection3(0:3). note: _ changes to an space
i've heard on other forums even server forums using your plugin of duping issues, have you fixed them or is the dupe still possible? Talking about duping keys and crates.
Are you sure they mentioned this plugin specifically? I know there are a lot of "Mystery Crate" plugins that exist so they may not have meant this one specifically.