Money and army caches are usually worth it to go seek out, but these resource caches are absolute garbage IMO. I’ve gotten some that are like, 3 copper.
I would say that at my current place in the game, the money caches average 3-4 billion, army caches are anywhere from 200mil-1.5 bil, and these resource caches average 20 zinc bars as their pay out.
I think the most I’ve ever gotten from one was ~100 mil in value, but that was literally once, they probably average about 200-500k in value.

Maybe make these able to give items you can’t even craft on your current level?

It is a little odd how Market Raid is so insanely overpowered and the resource caches are so underwhelming but development needs to be funded somehow!

This was fixed a few updates ago, but I can see you've been on your current level for a long time so you're still in a level with bugged resource caches. Sorry about that. Once you start a new level it'll be fixed for you.

Edited 11/10/2020 15:27:19

Resource cache gave me 7.2 bars of iron. I have artifact that gave me the extra 0.2. But if I go to sell bars, I can only sell 7 bars. And tech upgrades only use integer values of bars. So the 0.2 is potentially useless, unless I get more fractional bars to add to a whole bar. I'd say to fix, either allow to sell fractional bars, or maybe just stick resource caches to ores?