Guild Wars 2

Is Diminishing Return effects active on crystallized supply caches, noxious pods, and airship cargo?

Hot Boy.7138:

Is Diminishing Return effects active on crystallized supply caches, noxious pods, and airship cargo?

There is no evidence of DR being applied to any other containers in the game (on the contrary, the evidence suggest that there isn’t any).

As for whether there might be DR associated with open world chests (keyed or unkeyed): it would be impossible for players to test that. The variability of the drops (not to mention the complexity of drop tables) would require comparing results from 500+ drops if not 1000s, under controlled circumstances. It’s just not possible for us to collect that level of quality data. (If you look at crowd-sourced data on the wiki, you’ll see that it’s hard to get that many people to contribute.)

Containers (such as bags and caches etc) on the other hand — it’s easy enough to collect 1,000 or even 10,000 and keep careful track of the contents. (A lot of those results are available on the wiki, on reddit, and gw2shinies, among other public sources.)

tl;dr there’s no known DR for containers; presumably there’s none for open-world chests (but there’s also no way to test it).