Random 'world' drops are initially extremely rare, but over time you can improve it. For example, there are direct influences, like an upgrade that increases the flat drop chance of those items, or one that lets more monsters spawn on farm maps, which means more kills, which means more drops, as well as indirect influences, like the fact that your raiders get better at slaying stuff faster when you get gear and skills that are good for those tasks :)
I reseted four or five times, and i dont gain diamonts descript in screen of reset... last time u have 460 diamonts, if i reset i will gain 732 diamonts... but after my reset i just have 479 diamonts :s WHY?????
 "Idle Roller"){kind=icon}
 "Let's Fish"){kind=icon}
 "Idle Raiders: Second Run"){kind=icon}
 "Insanity Clicker"){kind=icon}
 "Transport Defender"){kind=icon}
 "Goldcraft"){kind=icon}
 "IdleVenture"){kind=icon}
 "Idle Conqueror 3.1"){kind=icon}
 "MineQuest"){kind=icon}
 "Idle Conquest"){kind=icon}
 "Idling to Rule the Gods"){kind=icon}
 "Clicker Party"){kind=icon}
Random 'world' drops are initially extremely rare, but over time you can improve it. For example, there are direct influences, like an upgrade that increases the flat drop chance of those items, or one that lets more monsters spawn on farm maps, which means more kills, which means more drops, as well as indirect influences, like the fact that your raiders get better at slaying stuff faster when you get gear and skills that are good for those tasks :)