Steam Inventory Items - Question

Hey guys, ive got a question about the dropping system for the steam inventory items for rust, those that are trade-able at the steam marketplace. Ive read its being dropped randomly over time when playing on a server, but what are the rates (how many hours in average) and is it regularily distributed over time? ive heard comments reaching from 60-100min per item up to 24-36h per item and have played myself for round about 30 hours since ive started again after years. Some Ppl are even saying after 200h of playing there has been no drop at all. Maybe: is there anything else to take care of to ensure theyll drop? So those guys and me are doing something wrong?

Greetings, Darabasi