The Copied Factory loot rules are garbage.

[Iscah]

Rule #1 of the loot: The more you want it, the more it ain't gotta drop.

Rule #2 of the loot: If you farm hard enough, effort will bear fruit, and it will drop.... and the guy beside you will get it. (which in your viewpoint will have less contribution than yourself)

Rule #3 of the loot: If you think of providing less contribution for a higher chance, people will saw your lack in contribution and give you the boot.

Rule #4 of the loot: If you think people will help you after they got their stuffs and you shall have your turn...

Rule #5 of the loot: If you get lucky and it drops first-time, you will be distracted and forget to roll.