Na, this is something else. It probably changes the loot parameters all together. I just searched for the values 1 to 5 after increasing the rarity at the camps. It's one single value that goes back to 0 every time you restart a level. Once you put it to 99999 you'll get a legendary from every large chest and most minibosses. But some drops are predetermined by the game and will not be changed.
What type of value are you searching? 4 byte, float, double etc?