I don't know what is happening for me anymore but the Purified Nth Metal 500 exp no longer drops for me during the game, is anyone else having this problem? or is it only on my account?
So Nth Metal values were changed last year, now we have only three types that drop: Raw (10), Processed (100), and Flawless (1000). https://forums.daybreakgames.com/dcuo/index.php?threads/episode-41-rewards.316931/#post-4421405
