1. Treasure is too predictable and easy to reach.
Just look at the current HOF list. People stopped hunting, mining and doing nothing else then waiting for the treasure.
Suggestion: treasure should random spawn at different (random) places and grow until gets picked up (it would feel more like treasure when someone finds it)

In case nobody finds a treasure in specific time, it would just re-spawn at a different place again.
2. Oil rig is not attracting players.
Oil rig should be more hard to reach, but when you're there, it should be a mob safe place (only human should be a threat over there)
Suggestion: replace uber mob spawn from the oil rig, to the path which leads to it.
3. I'm poor
Suggestion: gimme dinarz!!
